Thecus N2100 has two ethernet, minipci, USB, serial. But although
it's low power, it's quite noisy (most of my fast arch boxes are
*far* quieter). Maybe it would be ok with a SATA<>CF bridge and
the fan removed...but then it really could use another ethernet
port or two. And it would be nice if it had something like the
"+++ reset" / "+++ power" feature that the net5501 has.
I just noticed Commell LV-681 (socket S1 amd64; ati chipset)... it looks
quite expensive, though, and at least where I live, only a limited part
of their product range seems to be available (VIA/Intel CPU mini-itx
boards mostly - BVM list some of the others but weren't capable of
answering email last time I tried).
Not all Intel CPUs are i386-compatible, of course...
Freescale is a company, not a CPU architecture - looks like
they have designs using powerpc, arm, etc.