what do you use yours for if you don't mind me asking, I'm liking the idea of media streaming.
One of them is an Apache server that runs PHP and ProFTPD. It is awesome. The SD card is slow, so it can't serve pages to a lot of people at a decent speed, but for playing around with PHP functions that free webhosts don't allow, it is great. It is like a mini dedicated server. It is also nice to have it be low power consumption and silent for running 24/7. I made a backup of it when I got it all working nicely, so when I screw it up, I can take it back in time. SSH tunneling through it is great too (for a lot of reasons).
I bought the other one when I decided the first one would stay that way. I figured I would have another application for it, but haven't found one yet. I played with the HDMI out on it (which is amazing). With a keyboard and mouse plugged in, you can browse the web, and so much more.
My only complaints would be that it needs exactly 5 volts in. I have a
Phidget SBC, which will take anything between 6 and 15 volts in. The Phidget SBC is also tolerant of lower voltages, and will just shut off. I have used my SBC with just a solar panel and a capacitor all in parallel, and it runs fine. When the capacitor runs out, it shuts off. My other Raspberry Pi complaint would be that the GPIO is a lot harder to use then the SBC's. It also doesn't have analog inputs AFAIK.
It would make a nice media server for sure. I bought a Western Digital My Book Live, and now that you mention it, it would have saved me money to get a USB external hard drive and set it up with the Pi. Just get a tiny SD card for booting, and have it share /media/DRIVENAME over FTP, NFS, SMB, AFP, etc.