The Bellwether Foundress addresses the Companions of the Lamb.

Who's the Foundress?
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I expect it is Nadine Brown, but the author of the statement only refers to herself as Foundress.  I suspect she is not quite sure how to identify herself due to the fact her vows have been annulled.  Just as I suspected however, the group is 'reforming' as a private association:
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As Catholic Laity and as priestly people, we continue to participate in the intercessory mission of the Lamb.  Archbishop Lucas has stated in his news release of October 15, 2010 “Of course, Catholic faithful are always welcome, in virtue of their Baptism, to associate together and to pray. I would encourage those companions and associates to continue to pray for the former vowed members of the Intercessor community, for the Church, and for the needs of the world.” This means that your prayer groups are able to continue to gather together for intercession. Please let us know if you would like us to continue visitations to your groups.
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Since the Companions have never been part of the Public Association of the Hermit Intercessors of the Lamb, the suppression of the Public Association of the Hermit Intercessors of the Lamb does not mean that this extends to you as Companions. - Foundress statement.
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Obviously the Foundress has been talking to lawyers, canonical as well as civil.  Seems to me she is acting within her rights as a baptized Catholic lay person:
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Many of you have also inquired about the civil corporation. The civil corporation, Intercessors of the Lamb, Inc., is a separate legal entity than the former Association of Hermit Intercessors of the Lamb and has always functioned as such, as an independent civil corporation, which owns and manages the property and other business affairs associated with supporting the mission and charism. On September 30th, when Archbishop Lucas asked me to resign as the General Director of the Public Association of the Hermit Intercessors of the Lamb, I was also asked to resign from the office of President of the civil corporation and from its Board of Directors. I obeyed both of these requests.
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It is important to note that the civil corporation, which remains a non-profit corporation in the State of Nebraska, has been in existence since 1980, a full twelve years before the Hermits were recognized as a Private Association of the Faithful, and eighteen years before the Public Association of the Hermit Intercessors of the Lamb was erected by Archbishop Curtiss. Intercessors of the Lamb, Inc., is a 501 (c)(3) (tax exempt) corporation, separate from the Catholic church. On page 2 of the original Form 1023 Application for Recognition of Exemption, it states, “The organization was formed in response to the need to call persons to the experience of prayer and contemplative solitude, in the midst of the complexities, haste, and multiple demands imposed upon the individual by contemporary society.” Since the mission remains the same as is stated in the original exempt application, all of your contributions to Intercessors of the Lamb, Inc. continue to be tax deductible. - Foundress statement.
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Mother Nadine and companions were never excommunicated or placed under interdict, although their Public Association was canonically suppressed and they were dispensed from their religious vows.  (I've been told these were private vows and they were not technically religious.)  As a lay person, Nadine Brown appears to be acting within her rights and is not using the name "Catholic" except to identify the Companions as a group of Catholic laity.  Brown's statement doesn't mean she is not a faithful Catholic either - she did exactly what the Archbishop asked her to do...  One big mistake may be in her statement:  "Our mission continues and our charism is the same."  I doubt the Archbishop would agree with that. 
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Religious people do this kind of thing all of the time anyway.  Medjugorje still goes on despite the local Bishop's prohibitions.  Locally, a holy woman continues to have prayer meetings wherein she receives locutions despite the fact she was asked not to publish them and was forbidden to conduct the meetings at church.  So she does it elsewhere.  Don't forget, dissidents have worked the system just as well without ever getting themselves excommunicated, much less disciplined. 
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Just watch out for those holier than the Church types, and work out your own salvation in fear and trembling..
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Link:

Archdiocesan warning on Intercessors of the Lamb Resources.