For those keeping track, and in response to another posters question, here's where we stand so far for season 10:
The pros that are confirmed to be returning are: Tony, Louis, Maks, Derek, Mark, a newbie named Damian Whitewood (he's an Aussie who did Burn the Floor), Cheryl, Anna T., Edyta, and Chelsie.
The pros who confirmed they are not returning are Dmitry, Jonathan, Lacey, and Karina. Unconfirmed word is Kym isn't back, but nothing yet directly from her, Alec, or Anna D.
No word on who the 11th pro is or if they possibly are only having 10 couples instead of the rumored 11. Dmitry said he was supposed to be on the show and the producers were fighting for him, but the pairing didn't happen. Whether that means his celeb backed out or they couldn't find anyone for him, I don't know, but if they really wanted Dmitry on I think they would have found a way. They scraped up Melissa and Holly at the last minute during season 8. And I doubt they'd lose a week if meant scaling back to 10 simply because a celeb backed out. There's a rumor that there's either only 4 female pros this season to 7 male pros, and that whoever the 5th one is is a newbie as well. Snow Urbin, who did So You Think You Can Dance way back when and participated in the pro competition in season 8, has tweeted she has something big coming up so some are speculating she could potentially be joining the show. Another rumor had Ashly DelGrosso, a pro from seasons 1-3, as returning, but that same rumor also said Karina was coming back and she isn't after all. And a third possibility is Damian Whitewood's girlfriend.
As for the celebs, it's been really quiet on the rumor/spoiler front this time. Tom tweeted that he's done taping the promos for the new season and loves the cast. But hopefully TPTB haven't kept it a big secret because they know the cast will bomb and they don't want people turned off in advance Pamela Anderson is allegedly the only confirmed celeb on this season, along with "someone who's walked on the moon". Rumors that were either started by the celeb in question, carried over from last season, or put out there by another source is:
-Kate Gosselin (told Jay Leno she'd love to do the show because she can't dance for crap and wants to laugh at herself ),
-actor/rapper Simon Rex (tweeted)
-a mixed martial arts fighter who I think is named Jason Chambers-actress Jennifer Grey (mentioned in an article shortly after last season ended, said she was in talks with producers)
-actress Genie Francis and her hubby actor Jonathan Frakes (said she'd love to do the show together)
-Lynda Carter (mentioned on a random website)
-Dean McDermott, Brandy and her brother Ray-J, Latoya Jackson (all carried over from last season)
-Paula Adbul (was supposedly being courted by ABC with a TV development deal and a $1 million offer, and said she has something big coming up)
-Olympians Greg Louganis, Evan Lysachek, and Johnny Weir (all have said they want to do the show)
-Cameron Mathison is dropping hints someone from All My Children will be on
Louis and Tony sound like they're meeting their partners Friday or over the weekend and Edyta said she's meeting hers on Sunday.