Hi Squeak: If it's an economical, ultra lightweight (13.5 lbs)/small (50" x 9" x 3.1") as possible 88 note controller you're looking for, I recommend checking out the new Fatar StudioLogic TMK88 (street price $299):
http://www.musiciansbuy.com/studiologic_tmk88_controller.html

It received quite a favorable review in the Jan 2004 issue of Keyboard magazine. The only drawback is that it doesn't include a pitch bend wheel.- Scott