Someone posted a while back asking about how the old board format had a link you could click to see a list of all of the posts you either created or replied to, and whether the same thing existed on this new format.
I just found it!
When I clicked the link for "Wedding Club Boards" on the left to find the May 2010 board and the new page loaded, I had a list of "My discussions" on the right side of the screen with a link below that says see all.
HTH!