Just a thought for those with a glue habit and a bit of printer film hanging around ...
http://www.sandehalynch.com/link/flash_diffuser.htmEasy to make if you have the materials handy, and it might even save you a few bucks. Of course, you could also make them colored if you have the right fabric lying about.
This is just a scan. I'd like to show the diffuser in action with a fancy red elastic band, but I sold off my digicam and am still waiting for the other. Maybe later I'll put one up.