I'd tend to agree that if it is something you'd like to do... it's a way to keep current with things, and something that could even look good on your resume, if needed.
You do need to be able to *not* do it after you start this nifty new job, though... which of course would happen the moment you start volunteering... :-)
Since it's data entry...sounds like it's something that can just be worked on in chunks. And the guy that thought of asking me is aware that I'm in job search mode. Should be fine, I think.
I'll know more Wednesday, hopefully!