[daulex]

He makes some very good points, but I think it's still very early days for PaaS and it's evolving at a very rapid pace.

I'm sure functionality such as "load balancing between multiple data centre providers" isn't too far around the corner.

[gsiener]

Exactly, just came here to say that. Heroku has some serious cash and resources post-Salesforce.com acquisition, seems like they should prioritize redundancy across another provider or whatever datacenter(s) Sfdc are using.