Every time you launch a blog you should do a press release about it at
www.PRadult.com - great link building tool.
We also have several directories you can submit them too, no recip required (and still free)
http://www.okaysites.com/
http://www.baddogsites.com
http://www.goodgirlsites.com
http://www.directoryworthy.com
http://www.hotblogsites.com (blogs only)
http://www.hotsites411.com/
with the description, be sure to make them rich with keywords that you want the SE to associate with you