Linuxdevices.com has the scoop on a nice little device called the Giga Vu Pro, a media transfer and storage device. It will handle all of your JPEGs and raw photos, play audio and video, and will let you play DOOM on the go. Most importantly, it has an open SDK to encourage developers to write software for the little thing. It comes in 40 and 60 gig flavors and looks pretty nifty (although it currently has a high price tag).
Update: It looks like Hubert beat me to it.