It's gonna happen.

I think we have figure out how to deal with it.
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Bad stuff is going to keep happening, and the thing I think we as Catholics have to do is learn how to deal with it - just like Catholics behind the Iron Curtain had to do when their countries and liberties were absorbed into the USSR.  That doesn't mean Catholics should go down without a fight, but being prepared for the inevitable seems to me to be a prudent move. 
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Obama is pushing for a repeal of don't ask, don't tell - Congress got on board, and chances are the Senate will be too.   Obama perhaps has found the gay agenda is something he at last can handle - thus he is advocating for same-sex marriage as well, in fact, he just ordered federal employees in same-sex partnerships are eligible for benefits.  The country is going down this path - like it or not.  Young people have been indoctrinated by public education (in many cases, private as well) already.  So we are almost there folks. Rather than attempt to speculate and predict all the bad things that could or could not happen as a result of these changes - I think we Catholics have to learn how to adjust to an anti-Christian culture.  We have to learn how to live faithfully and witness to truth and make the faith attractive to non-believers.  (Again, that is not to say we do not object, or get involved politically, as Military Archbishop Broglio demonstrated so well.)
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Military Bloggers and Don't Ask, Don't Tell.
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I found the following report rather interesting, since most civilians just assume military personnel would uniformly object to the repeal of DADT.  Obviously many don't.
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While pundits are split as to whether the Obama administration is pursuing the right path towards an effective implementation the new policy, most agree that the time to repeal Don't Ask, Don't Tell was at hand. To some extent, the move towards repeal was predicted -- and blessed - by a handful of highly influential military bloggers who, on May 12th, released a statement calling for the Don't Ask, Don't Tell's repeal. The letter includes the signatures of bloggers from the U.S. Naval Institute Blog, Black Five, The Military Observer, and the Warrior Legacy Foundation, and declared that, with repeal, "very little will actually change."

"If we're going to have women on submarines and gays in the military, then we should have the gay dudes on subs with the women so nobody gets pregnant." - Andrew Lubin [of Military Observer]

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The significance of milboggers' joint statement has been somewhat under appreciated. The military blogosphere is highly engaged with the armed services and has actively commented on military affairs for years, covering topics ranging from the Fort Hood shootings to the Hurt Locker. I spoke to Jim Hanson, who blogs under the handle "Uncle Jimbo" at Black Five. Hanson recently appeared on the Rachel Maddow Show to discuss the joint statement by milboggers and the repeal of Don't Ask, Don't Tell.

Even they see some problems however.
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While many of us believe that it's about time, I think there's been kind of mixed feelings as to why it had to happen now. The reason we wrote the letter we did was not to force a repeal, but to encourage Congress to take a look at how the law could be practically implemented. The military had been asking for a plan for the implementation of repeal for some time, looking to determine how the Don't Ask, Don't Tell could be efficiently and effectively incorporated into existing operations. This was supposed to precede an actual call for repeal.

There was a point of time when it was a reasonable adaptation to cultural norms.
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...[O]bviously, there are going to be major issues in implementing the repeal. Do gay dudes room with straight dudes? Do gay couples get on-base housing? There are tons of complex issues to overcome, but as long as we stop freaking out about it, it will make the process significantly easier. There will of course be people who are extremely displeased, and this is why we wanted Congress to wait and let military leaders figure out how it's implemented. As long as the policy is implemented as the service chiefs on the ground see fit, it should be no problem. While its fine to bless repeal at the presidential level or the congressional level, it's different on the ground level. There are military has regulations that have to be followed...seriously! If you don't follow military regs, you can go to jail. And Congress needs to listen to the military on the actual implementation process to make sure that it meets those pre-existing regulations. Follow the advice from the chief and let them do it and it will be OK. - The Atlantic

Get irritated, annoyed, angry, furious all you want.  It looks like it's going to happen. 
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Personally I think Congress, the Senate, and the President need to focus on increasing benefits for all military personnel, and most especially increasing health benefits and compensation for veterans who lost health, limbs, and in some cases their sanity fighting our wars.