My wifi took up 49% of my battery lastnite. I have it by the router so i can.t see it searching for a signal... Maybe it was ... I'm going to check tonite and turn it off to see what happens.
My battery life was terrible (couple of hours max) after I added the Google Market. But since then I've done a factory reset, rooted, added app installer, Acrobat reader, file manager, term emulator and a bunch of other stuff and the battery life has shot up to 5-6 hours of continuous use. I find that I can find and install everything I need without the Google bloat.
I use the app installer to sideload apps from the NAND memory.
