From Cage Writer:

While on "Inside MMA," Clay Guida announced that he will train at Greg Jackson's to prepare for his upcoming fight with Kenny Florian at UFC 107.

...

Joe Stevenson made the same change before his win over Nate Diaz. Quinton "Rampage" Jacokson switched to Wolfslair in England after losing his light heavyweight belt to Forrest Griffin. He then pulled off two victories, a knockout of Wanderlei Silva and a decision over Keith Jardine.

I just finished reading Greg Jackson's new training book and I'm even more convinced than ever that he's coaching MMA at whole different level from all but the most elite camps.

This is an excellent move for Clay Guida, although I must admit I'll be disappointed if it means we won't get to see Joe Stevenson vs Guida.

Another angle to consider is whether a Stevenson or Guida rematch with Diego Sanchez will be a grudge match between the original Greg Jackson fighter and the new guys.