F80 M3 test mule running around in Marin County, CA
Followed it briefly before it went onto the golden gate bridge, Estoril Blue II F80 with the swirly camo pattern on the front and rear bumpers. Might be in Sausalito? Last time I spied two E46 M3 mules before the were released, they were eating dinner downtown...
Good luck and post pics if you find them!