There’s the XSL transformations stuff that’s new… Although it’s somewhat sad to see it, with all the beautiful syntax highlighting, line numbering only to see that java services are still the same dodgy textbox.
Deployer’s got a bit more functionality. I ended up grabbing 6.5 to use on a 6.1 instance to get it deploying some new things like broker and workflow bits and pieces.
There’s the safe mode startup stuff, think that’s new in 6.5… There’s some sort of diagnostic port concept that will operate separately from server threads (I think in case all the threads are used so you can still see what’s going on… or to not affect the number of threads getting used or something).
SFTP support too, haven’t yet had a chance to play, but have some customers who will find this useful when they get a chance.
Trigger throttling and disabling per trigger via the web interface was one thing I found tucked away under resources in the webadmin.
I recall that the adapter stuff had a bunch of changes including being able to feed in the name of the connection to use and use polling notifications properly in a cluster.