Paula has a Niecy Nash-type of personality...kind of larger than life, great energy. She would be a lot of fun to watch, but no idea if she can move. Maks mentioned meeting her at the CMT's and said she would be fun but they would never get anything done because she's so crazy.
The big name being tossed around recently is Landon Donovan - I think he's even said he's in talks with the show. Lindsay Lohan has been joked about recently (including by Tony who said he'd go to the jail to teach her), but I really hope that doesn't happen. She needs to get some help first. Then she can use DWTS to resurrect her career.
As for the pros, my list pretty much matches karalott's, but I'm okay with everyone BUT Karina. I still like Cheryl but she did seem off this season. Her partnership with Chad felt really flat and uncomfortable and I never really saw a lot of chemistry between them.