"Gartner’s 2010 Magic Quadrant updates our evaluation of the top 25 vendors
in this [BPMS] market, based on Gartner’s top four usage scenarios for
BPMSs."
http://www.lombardisoftware.com/bpm-gartner-magic-quadrant.php
Intalio gets a mention as "visionary" (and uses Guvnor\Flow\jBPM)
Cheers,
Mike