I run btcnow.net, and after months of fighting with google checkout (got my IPN code working tonight), I'm taking my chances with paypal (with some major restrictions).  It will be a good test to see if they are still hostile towards bitcoin.  I operated fine on checkout for a while, but once one jackass got it in their head that it was some sort of criminal scam, they banned my account, and hunted down any new ones I tried to open up.  They said I didn't violate any TOS, but my business model was just "incompatible" with google checkout, and they wouldn't tell me anything more for "security reasons".