Hmmm. I'm sure I saw someone requesting this before. Anyway.
I have changed the User Profile page to show *ALL* discussions you have participated (including the ones you started, the ones you replied to, and the ones you are watching), in descending order of reply timestamp.
Previously that page showed only the discussions you started - I believe the list now is a lot more useful.
If the feature works ok we can easily port it to show the ten most recent discussions in the forum sidebar, Geekzone Live or in our frontpage.
If you want this reply here with your request for forum sidebar, Geekzone Live, frontpage or all...