A few years back (before the iPhone & Android were out) I hosted a website on my Nokia N82 phone. Nokia enabled this by routing requests to the server on your phone via a URL hosted at '<yourname>.mymobilesite.net' (now discontinued).
Chumpy looks interesting (feel like I should have known about it before now)..but I find the choice between battery+cheaper vs stereo unfortunate. I'd consider a Chumpy One + Stereo (at a higher price)..but as-is, I feel the available options lacking.
It does have a stereo 1/8th inch jack on it, and neither set of speakers is really any good for music, so if you really care about audio quality, I would use external speakers. Stereo doesn't do that much when the speakers are 4" apart.