Hi, currently I use my RPi with FreeBSD, though I have tried the debian and arch arm offerings, too. Works really well as the hub for some of my network storage devices. Though I do run it headless and control it through OpenSSH, it is very nice when run attached to a HDMI monitor -- I bought a sweet little 7" hdmi monitor through Adafruit which is great except for one small hassle: its resolution is so sharp that fonts can be rendered way too small for my not-too-old eyes to decifer them
wonderful for tv or video, though....especially at the price.