Well, they just HAD to go and retcon all of Morrison's hard work. That's a shame, since his work on the X-books were the best they've been in YEARS, and likely the best they will be for years to come, given the current creative teams. Whatever respect I once had for Claremont gets pissed away more and more with each wretched issue he puts out.
To answer ZGangsta's question in a more broader sense, my money is on the majority of the major mutants (Mags, Iceman, any other X-person who's powers were taken, basically all the high-profile characters) having their powers back in full by no later than January 1, 2007. I say no later, but it could be much, much sooner. Quite frankly, if this lasts through the summer, I'll be surprised. If "House of M" was supposed to be Marvel's big summer x-over series, I can see Summer 2006's x-over series to be all about the muties getting their powers back.