High Scalability Building bigger, faster, more reliable websites.

This may be a bit higher level then the general discussion here, but I think this is an important issue in how it relates to reliability and uptime. What kind of SLAs should we be expecting from SaaS services and platforms (e.g. AWS, Google App Engine, Google Premium Apps, salesforce.com, etc.)? Up to today, most SaaS services either have no SLAs or offer very weak penalties. What will it take to get these services up to the point where they can offer the SLAs that users (and more importantly, businesses) require? I presume most of the members here want to see more movement into the cloud and to SaaS services, and I'm thinking that until we see more substantial SLA guarantees, most businesses will continue to shy away as long as they can.

Would love to hear what others think. Or am I totally off base?

CloudCamp returned to London yesterday, organised with the help of Skills Matter at the Crypt on the Clarkenwell green. The main topics of this cloud/grid computing community meeting were service-level agreements, connecting private and public clouds and standardisation issues.