I'm using them for a mainstream store and it's extremly easy to use and set up.
And the fees are incredibly low. You will be ready to accept payments 5 minutes after getting approved.
Daily payouts.
https://bitpay.com/
If you open a shop aimed at Bitcoin users and make an announcement post on Reddit and a few bitcoin forums you will see sales the first day!
You'd be amazed how many of the Bitcoin users are looking for stuff to buy with their coins.
There is really no excuse to not start taking advantage of this.
http://www.reddit.com/r/Bitcoin/comm...s_now_accepts/