Msg#: 4214827 posted 4:03 pm on Oct 11, 2010 (gmt 0)
You simply need to set up a 301 redirect [blog.benacheson.com] which is a permanent, server redirect - from each of your old domains to your new one. This should pass most (but not all) of your PageRank, link equity and anchor text equity.
You might also want to notify Google in Webmaster tools for each site, but this is not essential:
Webmaster tools / (Select old site URL) / Site configuration / Change of address.