Here is another tip i found from Matt Cuts
"If I got a site banned what is the procedure to get it re indexed?
This is boilerplate that we're sending out to some site owners as a pilot program if we detect spam, but it's the most current info:
"If you wish to be reincluded, please correct or remove all pages that are outside our quality guidelines. When you are ready, please submit a reinclusion request at
http://www.google.com/support/bin/request.py
You can select "I'm a webmaster inquiring about my website" and then "Why my site disappeared from the search results or dropped in ranking," click Continue, and then make sure to type "Reinclusion Request" in the Subject: line of the resulting form."