Now there's an important distinction to be made here.  It's one thing for a player like Thomas to be available, and a whole other for him to be traded.  Anyone, and I mean anyone, on this team is available if the right offer came along.

With regards to Thomas, I wrote yesterday that if the Kings were to trade him, they would be smart to do so now when his value is the highest it has ever been and likely will be.  He's a player that is ready to contribute at a high level immediately, has a small cap hit for this season, and will be a restricted free agent this summer, meaning that team will have key control over his free agency (Note that all these advantages apply to Sacramento as well if they don't trade him).

The ideal scenario for Sacramento is for Rudy Gay to opt out of his contract and sign a longer extension for a smaller annual amount.  That would give the Kings plenty of room to re-sign Isaiah without hitting the tax.  But if he doesn't, the Kings should probably still sign Isaiah, because the tax hit will only last a year, with the Kings obligations falling dramatically after next year (Gay, Thornton, Outlaw all come off the books) and even more if Thompson and Landry are moved for smaller contracts.