I am very happy to report that the CV863A-based Lex Twister VIA 1 GHz Nehemiah Padlock ACE 3-LAN Gigabit Ethernet Dual-PCMCIA 1-PCI (Lex Twister CV863A3U10) small form factor PC I bought from Hacom is running FreeBSD 6.0. You can see the dmesg output courtesy of NYCBUG dmesgd.
I bought this system as a proof-of-concept mobile sensor. It's much smaller than the Shuttle SB81p I also use. The Lex Twister even fits in my consulting bag.
Although the Lex Twister is not as versatile as the Shuttle, it still supports a full 3.5 inch HDD. The model I bought also has three built-in Intel Gigabit NICs. Here is a look at the back of a similar box; mine does not have four NICs.
I installed FreeBSD 6.0 using a USB-connected external CD/DVD burner. I had to first try to boot the Lex Twister, have it find the optical drive, report an error, and then place the FreeBSD install CD in the drive and try again.
Is anyone using a small monitor, like these? If so, can you recommend a product? It would be nice to have one of these small monitors for emergencies, when connectivity by Ethernet or serial port fails.