At my current client I have been developing for WebLogic 8 the last year although there has been a number 9 around for quite some time. My next project will probably use WebLogic 9 after all the inhouse framework has made their move to the new platform. Isn't it ironic then that WebLogic 10 is already released? (According to TheServerSide.) Maybe not more than the fact that JBoss is for free and equivalent for all uses I know of.