hi..
we are currently using
jboss 4.2.3 as a development platform and websphere 6.1 as production one, the
IDE is eclipse 3.5.1
we are considering to move completly to RAD, but the costs are huge.
i was thinking perhaps we could use the WAS CE 2.1 with it's eclipse server adapter as a dev enviorment so it would minimize changes to our ear, however i don't know how many changes the configuration must go through between CE 2.1 and WAS 6.1
i saw this article on migration
http://www.ibm.com/developerworks/opensource/library/os-ag-cosbybuck/