Chris Garrett has a good post about Google’s supplemental index and how to pull your blog out of it.

[ digg it ]

Search-This currently has 159 pages in the supplemental index.

Additional reading on Google’s Supplemental Index:
http://www.seroundtable.com/archives/006740.html
http://www.seomoz.org/blog/how-i-escaped-googles-supplemental-hell
http://www.seobook.com/archives/002047.shtml
http://tropicalseo.com/2007/how-to-escape-googles-supplemental-index/