Have you used the site query command to see if the sites' pages are in Google's index?
Most web site owners just find that their site is not ranking well and come to the wrong conclusion that it has been banned.
If it is banned, you have nothing to loose by filing a reconsideration request, but like Will says, the chances for success are slim. Most of the time you will just receive a canned response advising you to check the guidelines page.
Last edited by TopDogger; 16 August, 2010 at 12:32 PM.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin