I received the NSLU2 yesterday and had a few cycles to play around with it. I flashed it with the latest Unslung firmware. That was pretty easy. I checked out a what packages are available to see what I could put on it. I installed OpenSSH, my public key. I also installed Apache as I'm pondering replacing my public webserver (running on a 466 MHz Celeron) with this. Finally, I did the overclocking mod to boost the Slug's CPU frequency from 133MHz to 266Mhz. Apparently, the unit I got was an older rev. I'm also looking into installing Squid as a proxy, not a cache, since I use my current webserver to proxy web traffic from work inside an SSH tunnel. I'm not sure if this will have the power to proxy better than the Celeron box.