Accurite(site info)
Developer of floppy drive diagnostic and repair products, PCMCIA/USB peripheral products, plus PCMCIA development and diagnostic tools.
http://www.accurite.com/
BusProbes(site info)
Makes bus and interface support pods for the Tektronix TLA Family of Logic Analyzers, supports buses such as Fibre Channel, USB, SCSI and Serial ATA.
http://www.busprobes.com