S.B.
Hi D.,
If you decide to accept credit cards, you might want to check out Costco. I just got the August 2009 Costco Connection magazine and they had an ad for their credit card processing services and a free terminal ($359) if opened in August. It says to call 888-337-1882 and refer to coupon code 832208 or go to costco.com and click on services. I am sure you probably need a costco membership to do this, but the rates seem much lower than what I have heard about from some stores. They seem to have a lot of business type services that they offer as well.
Good luck!