I brought one of these babies in Staples when they were on offer (half price). Because I knew the manager in the shop and I ask why the box had been opened, she then gave me a further 10% off, so it cost me about 32 pounds.
I immediately doubled the processor speed by taking out the resistor - but trying to telnet into the boot process has proven to be hard. ie I'm not fdaster enough with my fingers.
However, I have UNSLUNG (6.

and I'm running WIZD. I'm also running media servers on my iMACS and WIndows XP, but prefer to use the NSLU2 since it sit there doing nothing but NAS and media serving. I was going to use it as an iTUNES server but my wife still prefers to load CD's!
Having told all my former colleagues about the deal at Staples, they all rushed down to the local store and when I went to get a second unit to use purely as a linux box - they had sold out and then put the price up! Maybe I look on e-bay.
Despite being in IT for more than 30+ years and being a wiz-kid on operating systems across very many hardware platforms, stepping back to use basic UNIX commands is not something I'm enjoying, but be assured, I'd more than recommend these little boxes. If only they had been around fiften years ago, I would have saved my employer millions!
So bottom line is buy a number of these little babies and use them to fully automate your home and life.