My b2evolution Version: Not Entered

I have a quick question, I have several b2 sites and am looking at Wordpress to fill alternate needs (I'm deploying sites for non-profits). From what I can tell, Wordpress doesn't seem to allow easy management of multiple blogs within a site like b2 does. Has anyone messed around with WPMU and tried working with multiple blogs on Wordpress? I'd be interested to hear people's experiences with how the two stack up against each other in this regard (or any other anyone would care to share). Thanks. (I know this is more of a WP forum question than b2 but I'd love to hear what people here say [and perhaps have my original choice of b2 further validated]).