Kishore,
The best place for a consolidated list of the new OTM v6.0 features and updates is Jim Mooney's presentation from the OTM SIG User Conference last year:
http://www.otmfaq.com/forums/f31/otm...-417/#post1025 (OTM SIG User Conference 2007: Presentations)
I'm aware of a few more changes going into v6.0, but I'm not sure if they're meant to be released publicly yet (because they may or may not make the final release, etc..)
I can say that most people thinking about 6.0 are expecting a release late this year (Dec 200

and don't expect to begin implementing internally until June 2009 at the earliest (roughly the first CU). Keep in mind that these dates are still speculation, as Oracle won't commit to a release date.
Hope this helps!
Chris