OWC's USB to DVI/VGA/HDMI adapter is just like the ViBook version which we've been testing, and gives you up to six (four for OS X) extra displays on one computer. YES.
OWC's version comes with two swiveling adapters (the main bit, just like ViBook's is just a solid block), and supports up to 1600x1200 or 1680x1050. What's better about this is that it's got the VGA and HDMI adapters and comes in at $100, $30 less than the ViBook. You just need to make sure your displays support whatever resolution this can drive before you load up. [OWC]