Wondering that too. I really like the idea of having hosting in the cloud. But I'm not going to move anything critical there until the storage gets better and more predictable. All these stories you read about having to stripe several EBS volumes together to get even half-decent performance seems to add a lot of complexity/extra engineering for something that ought to just work out of the box. Seems to me that its unlikely that EBS will be any good until their entire infrastructure gets upgraded to 10gbit ethernet.

Meanwhile we still have 1 1/2 year left on our current 3 year datacenter contract(we run on 6 server vmware setup hooked up to a hitachi SAN on which we rent storage space). So Amazon have around 1 year left to come up with some good reasons for us to switch. Otherwise we will probably just grab another 3 years with the current provider.