SharePod can now update a firmware 3 iPhone or iTouch to the point where you open iTunes and iTunes will see the new content and update the device with SharePod's changes. The more tricky bit is to make the iPod see those changes without iTunes's help. (Which is what I am working on at the moment)
I just saw a comment on the previous post from someone (suspiciously called 'Jeff') who posted some marketing nonsense recommending another iPod manager. Apparently "its just like SharePod but with different colours". You know who you are, and I've never felt the slightest desire to go to your site (to post spam, or for any other reason), so don't do that here. And please dont pretend to be me either - thats just lame.