I hope to get a sheevaplug* at some point to be a small multi-purpose home server. If we can get setup of that (or something similar) to be as painless as setting up a facebook account and friending, we might be on to something.

I also want to use it for things like storing scanned images and possibly home automation/monitoring.

In short there might be a market niche for a low-power headless server to solve this kind of situation

*http://www.openplug.org/