You're certainly in the minority looking for super-high cap cards. I'm sorry, what is "WA-enabled hardware?"
In any case, if you are looking for personal experience and reviews/opinions about 4gb and up cap cards then I think you'd find more responses in a place like
www.dpreview.com (check the storage forum) and the like. At least those guys use high cap/high speed cards since they are shooting continous RAW files and need the high cap/speed.
Good luck.