i want to learn how to facilitate a silent auction. is there a group that will help me?
There are companies that do 'consignment auctions' which mean that they provide the item and run the auction for you, and you pay a set price for the items and get to keep any money raised at the auction above that price. For example, if you 'consign' an auction item, and their price is $100, you can start bidding at $150 - any bids over $100 are profit to you, and since you reserved the item on consignment, you don't have to pay anything if it does not sell.
Here's the list of such companies that showed up in a Yahoo search of "consignment + silent + auction"
http://search.yahoo.com/search;_ylt=A0geu.81.7FJCJoA4gpXNyoA?p=consignment+silent+auction&fr=
http://www.thebiddery.com/Silent%20Auction%20Guide.pdf
If you need items for your silent auction, consider a service like The Biddery. They get items that are 100% donated and don't charge a commission.