Payment Gateways

I am in the market for an online payment processor. Thus far, I’ve narrowed it down to two options, PayPal and Google Checkout.

This is for a small project I’ve been working on. I don’t expect a ton of revenue and would prefer a solution that doesn’t need to be monitored nor babysat.

It would be most helpful if the setup was as simple as possible because this is a small project and if processing payments means a few weeks work, the project becomes fairly useless.

Scott Pinkston has a project on RIAForge for Google Checkout. Has anyone used this cfc? Are there other resources out there for integration? Am I missing another good service? Have YOU had a good experience with a simple payment processor?

All advice is appreciated.