Don't worry about that kind of stuff.
EJB 3.0 is trying to evolve such that it will be easier to develop compared to EJB2.0 and remove some of the unnecessary steps. It is still in the evolution phase.
With respect to J2EE vs .net; there are two different lines of thought. Many of high profile firms use J2EE compared to .net(they had the choice to go either ways) including American Airlines, Southwest, Sabre, Coutrywide loans, JPMorgan Chase, Transplace, Cingular intranet etc(as you can see all these are observations from Dallas area). Verizon uses .net for their verizon.com site, Nucor steel uses .net.
There is scope of interoperability using webservices(many financial sector firms like Morgan Stanley use this approach). They develop client side stuff using .net and server hosting using J2EE.
I would consider J2EE as a safe bet for some time to come. Many small scale projects are also accomplished using opensource tools that are developed around or as helpers for J2EE(
Jboss, Hibernate, mySql etc).
So just do J2EE(don't worry about those hefty comparisions).
[ June 01, 2004: Message edited by: Kishore Dandu ]