BuddyPress.org

Much of the BuddyPress post and comment functions have been removed from 1.2.2 since they were no longer used at all. They were due for removal in 1.3 but I brought that forward because I didn’t want plugin devs making use of them. They are in the process of being moved to the back compat plugin. The activity stream tracks blogs, posts and comments and is a much better way (both performance and usability wise) of fetching the latest blog activity. Boone’s method is the way I would recommend.