Along the lines of member game/interactivity, Advanced Dungeons and Rabbits mod looks like it might be fun. It allows you to attack other players in a PvP style game with the info displayed under your avatar:
http://www.phpbb.com/community/viewtopi ... 0&t=543821
Not sure there's a way to see it in action without being registered but here's the demo forum:
http://www.electricnation.nl/adr/olympu ... hp?f=2&t=1
I took some screens so you don't have to register. Kinda cool what you can mod into phpBB boards:

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Again, I'm not requesting this.
I'm still keeping an eye out for a stock market type mod of some sort for buying and selling VV board member stock making use of VVs.