Well, I'm certainly glad people are suggesting you use EasyObjects! You don't have to use it, of course, but if you have made the decision to use the Enterprise Library (or you want to), then it is a no-brainer.
Here are your answers:
1. No, not at this time.
3. No, since this would involve supporting #1 first.
I don't have much nHibernate experience to offer you a comparison, but I did work on a project that used it one time, and they hated it. All kinds of memory usage issues, locking problems, and general instability. I did not have enough experience with nH to try and fix it, or even to know if it was fixable. All I can say for sure is the client was not happy using nHibernate.
Of course, that is my biased story, and I admit I wasn't the guy to fix those problems. I just know that I don't have them with EO.