Colin
A quick answer to your questions:
1. Not currently, but this is a requirement that we'll be looking at in the next 3-6 months
2. We support any db supported by Hibernate, which means Postgresql, Oracle, SQL Server, etc.
3. In the current application the security is at the folder level, but the framework can go down to the object level
4. Not yet, but we'll look at how we can support this as an extensible feature.
5. No migrations from other systems provided yet.
Cheers
Paul.