I've got a recorder--it uses a Palm Pilot and software I wrote myself:
http://wbo2.offline.org
Records ~15-25 samples/sec.
Obviously the WB will be the best way to see if the problem is happening, but I'd still like to figure out a way to "bench test" a fuel system to see if it's adequate or not. Does anyone have any feedback on how to determine what pressure to test at/other changes/etc..?