Not sure if you're still looking, but if you are, you should definitely check out GoGrid (http://www.gogrid.com). The interface is a lot easier than EC2's and there's no need to constantly backup the data on your cloud server instances as (unlike EC2) the storage is persistent.
I've been using the service for just under a year now and I completely swear by it.
Mosso is very limited by comparison---but I guess in the end it depends on what you're looking to do and how much flexibility you need.
I've been using the service for just under a year now and I completely swear by it.
Mosso is very limited by comparison---but I guess in the end it depends on what you're looking to do and how much flexibility you need.