WordPress 3.0, hands-down. Easy to install multiple blogs in one platform, each entirely independent of the others (including themes). Domain mapping: http://o

WordPress 3.0, hands-down. Easy to install multiple blogs in one platform, each entirely independent of the others (including themes). Domain mapping: http://ocaoimh.ie/?p=89495930 http://ocaoimh.ie/?p=89495930 Getting started with 3.0 multi-site: http://weblogtoolscollection.com/archives/2010/06/02/wordpress-3-multisite/ http://weblogtoolscollection.com/archives/2010/06/02/wordpre... Another multi-site tutorial, perhaps slightly out of date: http://ottopress.com/2010/wordpress-3-0-multisite-domain-mapping-tutorial/ http://ottopress.com/2010/wordpress-3-0-multisite-domain-map... It's easier these days thanks to 3.0's built-in multi-site support. Hope this is helpful.