The K100D Super is a great camera.
If I didn't already have a good camera I wouldn't hesitate buying one, however if I already had a good camera I'd wait at least until they make the official announcement before I made the decision.
You might pay more, but in my personal opinion your better off to buy your camera at your local store.
Talk to the owner or manager, and see if they'll help you out in the small chance that you need some warranty work done.
Don't get me wrong, Pentax is one of the better companies when it comes to camera issues, but a store standing up for you makes it a whole lot easier.
Which I have yet to see an on-line store do.
And if you must buy it on-line buy it through one of the major on-line stores like
Henry's
There are a few more good stores, and a search on this site should show you a few.
Otherwise there's a good chance that you'll end up with a Grey Market camera, which might not come with a manual, or it might not have English as an option, or something silly like that.