Looks like you can now buy replacement iPod batteries along with installation instruction. Just the thing for a year-old iPod with waning battery capacity.

Very cool. Damn them for making a $50 product that may be a viable alternative to purchasing one of the new iPods to be released in a week.

Now that this nut has been cracked though, I suppose it's only a matter of time before someone comes out with higher-capacity batteries, possibly with a new backplate, so a 10-gig iPod could have a 30-hour battery that's slightly thicker, with a 20-gig iPod's backplate to accomodate the additional thickness. Triple battery life would be far more useful to me than double the song capacity...