Just yesterady though I found out that its possible to easily install a minimalist Debian setup with the fluxbox WM. In fact, this how to will be over before you know it. If you have installed Debian before, then you will be on familiar ground.
Read it here
I love the minimalist Linux distributions out there and have tried a half-dozen of them so far. The slackware based minimalist distributions especially are very good, being very stable, fast, friendly, and easy to play with. I highly recommend Vector Linux for example, I have it installed on one of my computers and just love it for its speed and stability.