http://www.appleipodsettlement.com/
about 2 months ago appple settled a class action lawsuit and if you have had battery failure or even if you just bought an 3rd generation (maybe 2nd as well) in the last year you can fill out the fourm at that web site and you can choose from either $50 at itunes store or a new ipod(hmmmm tough choice)
i suggest checking it out first and see if you can get a free one out of apple
EDIT
you better act quick the claim forms need to be postmarked by july 29th