An update on wireless mechanical keyboards--The new KBtalKing Pro Value Edition is almost out (on pre-order @ $149).
http://kbtalkingusa.com/pre-order-keyboards/
If you want wireless keyboard, it seems Bluetooth is the way to go. I have not noticed much lag time with my Kbtalking Pro. Of course it's a mechanical keyboard with a ton of high end features packed in and is a bit higer than the price range you're looking for. But it might be looking into.
Very niche high end market indeed...But if one can control a bunch of stuff, it may be worth taking a look at. The Taiwanese made KBtalKing Pro just got released (well, almost). Seems to be made for the hardcore users and engineers, etc. kbtalkingusa.com
nice to learn these different tricks for properly drying up a keyboard or any electronics that got wet. i think water is not too difficult. what if it's coca cola or soda? I'm guessing it'd be a lot worse and harder to clean.