Well, first off the ability to just add one USB device is a little boring, I’ve been using a Belkin 4 port USB HUB, and the results are good. For cooling the GoFlex, you may want to remove the bottom cover and keep it on a laptop cooling fan or something similar, as the processor does tend to get hot slowly.
Maybe you could throw in a WiFi USB card, and turn your Goflex into a very powerful NAS, something that I’ve done is:
- Have a DLNA/UPnP Server running, as I have it as my NAS
- Internet Gateway
- Torrent Station(I use transmission daemon with the Web UI)
- FTP Server
There are way more applications of this tiny little plug computer, I’m using it for development.
Also, it’s preferably better to have Gentoo or Arch Linux on a USB stick, as when testing several times by hard power offs and resets, you don’t want the SATA drive spinning up for no reason.