There's a spotfinder script that looks for connected devices. It is included in the Sun SPOT SDK and there's another up-to-date version for Mac OS X (http://www.sunspotworld.com/downloads.html).
This will be done by other means... namely as Testbed Runtime is now able to host plugins there'll be a SUN spot plugin that is independent of both wsn-device-drivers and wsn-device-utils.
There's a spotfinder script that looks for connected devices. It is included in the Sun SPOT SDK and there's another up-to-date version for Mac OS X (http://www.sunspotworld.com/downloads.html).