Y Combinator’s FathomDB looks pretty neat
Final pricing for the service is still being determined, but the company plans to charge a small (~10-20%) markup over standard EC2 prices.
I think this is pretty neat. It's a great trend. I hope they don't have any 'center point of failure', I hope their monitoring resources and backup locations are widely distributed. I think DB backup brings in a lot of value.
This screenshot at Techcrunch looks pretty interesting: