Two things come to mind – not certain if WordPress is up to it. Perhaps a widget could be located to help!
Full member list, with buttons by each name to add or delete as a friend.
Groups – ideally, these would parallel Babbage groups in SL. I’ve totally lost track of SL Babbage groups, and am clueless about any new interesting groups. So, either a page with all groups listed (and maybe a link to the join option in SL), or an actual website group set up for out-world conversations. I’d think the list might be the easiest. Everyone would need to contribute their knowledge to you for that, I’m sure. PS: Thank you for all your hard work!