Add Transaction support.

Hi everybody,
i wanna know if you have the purpose to add a Transaction control feature to the hibernate component.
I'm currently using it in conjunction with nanowar, so for each request i have a Session being open on it's start, and being closed on it's finish.
So i'd like to know if you are planning to add Transaction control feature, so when a session is opened, a new transaction is started, and when the session is closed, the started transaction is commited or rolled back, and then closed.
Best regrads,
Alexandre Martins.