There has been a lot of discussion on what would benefit posters, and since when you click profile, it shows posts that you have both started, and posted in, but the times of activity seem to be worthless (no offense). I clicked on one thread this afternoon to see if my solution worked for someone and it says 7 hours ago. When you click on the thread, the header of the thread says thread started 5 hours ago. Which is actually the last activity.
It seems it would benefit everyone involved if they could simply click on the profile, and knowing they haven't been back in 8 hours, to see if any thread they've been to has had activity in that time frame. However, currently, that doesn't happen.
Just a suggestion, and I understand that now that 1.5 is just about tweaked, the bbPress will get its attention.