You can get SBC (single board computers) based on an ISA slot much, much faster then that!
I currently have a Pentium3 850Mhz, also saw a dual XEON or Single P4 versions; but they were a lot more expensive. These do not need any other ISA cards as all is integrated in the board itself. Works a charm. Currently contemplating on how to feed the beast; as it probably needs more power then the ISA slot on a 4000 can deliver...
