This function isn’t in BuddyPress yet as far as I know but it should be a pretty easy addition. I’d create a ticket on the Trac (trac.buddypress.org) marking this as an enhancement.
Also, in the interim you could use the forum RSS feeds for notification.
Yes, but e-mail notification is a great way to keep members interested (and coming back) – and not everyone uses RSS.
Can’t we use bbpress forum plugins to do the job,and also can we use bbpress plugins in the forum in groups?
@gpo1
Due to all communication of buddypress and bbpress being done over xmlrpc, the normal plugins most likely won’t work. I have been looking at ones like a view counter and they require massive modification of buddypress. Because of caching, the forums are not always pulled from bbpress. So it would produce falsely low view count.
Also, group forums, are just a single forum in bbpress, this changes the administration and moderation of the forums and topics. If someone is a moderator on bbpress, they can moderate the whole site I believe, with buddypress a moderator is only a moderator of that group forum.
Hope this helps,
Brad