I thought I'd let people know that I got the MidiSport 2x2 working with PD under Linux. MIDIMAN doesn't supply Linux drivers for this device however Bill Orcutt (Thanks Bill) suggested trying the ones here:
http://member.nifty.ne.jp/Breeze/softwares/unix/usbmidi-e.html
You must also download firmware to the device which you can get here:
http://ezusb2131.sourceforge.net/
Jim