I was just wondering about what this really meant. I am only peripherally knowledge about the various Anglican issues and sub-groups.
Oh. Not a problem. I'll give you the Reader's Digest version (to be corrected and/or expounded on by others if necessary):
The TAC is a group of high-church Anglicans who are very Catholic in doctrine and discipline. This, if I recall correctly, is based in the Oxford movement of the 19th Century (the same movement of Cardinal Newman). Due to the chaos in the Anglican Church, especially in the last few years, they have been considering petitioning the Holy Father for full union in the Catholic Church. This article explains that this has now taken place.
The TAC's position is in contrast to some of the other "Continuing Anglican" groups who disagree with The Episcopal Church's positions on homosexuality (and even a few still who disagree with the ordination of women, especially to the episcopacy); the other groups seem to be more Evangelical in discipline and belief, thus they haven't been leaning towards Rome.
I'll ping Sionnsar and Huber to this post. Either of them could fill you in more fully on the situation than I can.