I'm saddened by Oracle's purchase. I
think that the talent has leaked away,
and Oracle has no clear idea of what
they want to do with WebLogic. They've
been stuck on version 10.1 for a few
years now.
There are a couple of problems with the above comment. First, Oracle only purchased BEA 1.5 years ago, and even then that wasn't a DOJ approved transaction. The final sale was not approved until something like 12 months ago.
Secondly, Oracle has made three releases of WebLogic since acquisition. They are now on version 10.3.1 (or "11g").
Lastly, I think Oracle is - surprised to say that I am - moving in a clear direction. With the recent acquisition of Sun, Oracle is now the primary provider of Java technology and has what many consider to be the leading Java application server. They would not have invested in these companies and technologies without a clear plan to dominate the market. I think Oracle's recent movements in the Java EE 6, WebLogic, and JDeveloper spaces show that they are pushing extremely hard to become the Java leader.
I'd still prefer JBoss; it's simple and just works. I'm having loads of problems converting a Seam 2.x app from JBoss to Weblogic, but I'm hopeful that I will be successful at some point.