What really sucks about PC-104 SBCs is 1) they cost too much and 2) you can't find online pricing.
Not much can be done about #1, but Notes on PC/104 Hardware for FreeBSD pointed me to WDL Systems which actually has prices listed!
I still think I made the right decision in going with RVHE boards for Touch instead of PC-104 SBC PCs. The PC-104 solutions would be three to four times as much. Most of what I do doesn't need that much CPU power or expandability.