for warping, I've had a bit of success with putting them flat on top of the refrigerator and putting something heavy like a dictionary on top. give it a few days(weeks?) and hopefully they'll flatten out enough to play.
for cleaning there's always this:
http://www.wellspent.org/Product?p=27203&c=9352
Recoton's site(they make DiscWasher) is currently under construction...