So pretty... I love them, but they don't seem to be the most hardy fish. RS has a sub-fourm dedicated to them with some great info... great personalities !
http://www.reefsanctuary.com/forum/index.php?forums/bluespot-club.147/
They don't last very long is most tanks. So many people have tried to keep them w/o success. They are a temperate fish from the Sea of Cortez and thus should be kept at cooler temps then most of us keeping our tanks.
Two good informational posts (if you haven't already come across them in the bluespot club forum):
Post 21: What You Need to Know About Bluespots
Post 22: What You Need to Know About Bluespots
@Woodstock has had success with a pair if you want to read up on them here: 65 Gallon Bluespot & Clownfish Home
If you can live with out the blue spots, consider the Yellowhead Jawfish aka Pearly Jawfish. It's a lot easier to care for since it's from tropical waters. It's got a similar personality. Like other jawfish, they tend to be shy, at least at first. They are also excellent jumpers, so you must have a tightly covered tank.