create a place where people can plan trips together
I am always wondering who else has the day off when I plan a trip out alone, and often do find other people out there, and I think about the gas that could have been saved if we had carpooled. I think it would be neat to have some sort of upcoming trip planner, where someone would post a trip they have coming up on a certain date, and other people could look at it and decide if it was something they would like to do, within their skill level, etc. Then the people could PM or exchange other contact info and plan from there. It wouldn't even need to be very complex, even a specific message board or something like that
Josh Lewis commented
Have you tried the partner forums?
While I agree that more could be done to make the partner aspect of the site better, this could perhaps hold you over.