I haven't checked the specs as to how far things are supported, though generally JOnAS keeps pretty far ahead. I've never heard of an "unstable" formal release, though. You can hot-deploy via the JonasAdmin utility.
An IDE is no substitute for an Intelligent Developer.
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com