I finally got it working using the MCP2551 transceiver on the FEZ Mini.
Some Notes:
FEZ Mini > MCP2551 > Note(MCP2551)
[line]
Di4 > 1 > TxD
Di2 > 4 > RxD
GND > 2 > Vss
5Vout > 3 > Vdd
GND > 8 > Rs (tie to ground for High Speed)
NA > 7 > CAN Hi to Vehicle
NA > 6 > CAN Low to Vehicle
NA > 5 > Vref (not used)
Working at 250kb/s connected to Vector CANcaseXL logger running CANalyzer
BRP = 12;
T1 = 15;
T2 = 8;