I think it's great that there's another option out there - thanks for pointing it out, Jason. Having just done the battery replacement thing for an iPAQ 3600, though, I have to note that the folks at LinearLogix:
http://www.ipaqupgrade.com/index2.html
...will give you the battery
and install it for the same price Laptops for Less is charging for the battery by itself. I had a great experience with LinearLogix, so I'd go with them before Laptops for Less - hopefully the latter site will realize they need to undercut the competition and start dropping prices.