ive used wordpress for this. i have about 50 sites using wordpress for affiliate content as i find it easy to update once a month. site examples are
http://www.alltoys.co.uk http://www.ilingerie.co.uk and
http://www.totallytacky.co.uk not outstanding domains but the traffic is coming due to what we are putting on them. They make about £50 a month each so x that buy 100 sites i plan on using this method should bring good steady money in.
I also develop bigger sites, latest being
http://www.localfavours.co.uk where local people can bid on the jobs you hate doing. I know i have a long way to go but im always a tryer.
Hope the above helps...
Paul