Well, change whatever it was that you were doing (perhaps over aggressive link building/spamming), and submit for reconsideration.
This might be a temporary issue. and I am sure your site will agains come on first page. I have experienced the same. It's kinda difficult to understand big Gs algorithm.
I see 742 pages in the Google index: http://www.google.co.uk/search?hl=en&q=site:allnicolerichie.com&btnG=Google+Search&meta= Who says it's banned?
YOur site is not banned in Google: http://www.iwebtool.com/google_banned?domain=allnicolerichie.com. I just checked for several sites (some well established) and seotools.ukwebmasterworld.com showed that they are banned
happened to me may times just wait in a few days or week you will be back at the top because you site has the keyword that was search so if if you looking to enter the key word make money the best domain would be makemoney.com it's simple but you titlle and descryption should be make money.