Vince has the right idea.

What I REALLY want, is this:

http://www.sprint.com/business/products/phones/ppc6601_allPcsPhones.jsp

but with a hard drive (5GB would be good.  20-40GB would be better).  And WiFi would be cool too.

Some hardware buttons for controlling the media player would be nice.  But I’m sure a good “media mode” system could be delivered (with a low-power music-only mode).

You build that… and a smaller i600 size version (no keyboard, flip phone, smaller screen)… and you’ll change the world.