In the last year I've gone to running three Sheevaplugs - one for dev, one as an AFS and Zephyr server, and one as my secondary DNS. That leaves one "big" server (Dell Poweredge 830, 4 SATA drives in 2 software-RAID pairs) which is now responsible for most of the noise in the room, but is also the most important, as it holds (among other things) 130G/over a decade/nearly 70 thousand of my pictures.
Conveniently, Marvell/Globalscale just announced the GuruPlug: a SheevaPlug with
This looks like it will make a fine replacement, given a SATA port multiplier (perhaps something simpler than the SATAport 5-way) and external drive bays - plenty of circulation, no noise, and around 2TB of disk. The main question will be whether I phase it in (OpenAFS volume movement works just fine) or do it as a full in-place upgrade (as I did with the other SheevaPlug AFS server, which replaced [over the course of half a dozen reboots] an old SparcStation...)