I've just come back from a Blackbaud NetCommunity user group in their London office. They've had others in the past 2 days and this was the last of the current lot. We had a general presentation from Robert McAllen on interactive websites, and then some future features of NetCommunity 6.20. Some of the staff haven't had the presentation on that yet (I think it's tomorrow guys) so I won't spill the beans here - yet.
As it wasn't just a product presentation but a user group we got a chance to talk to each other I was able to hear about other people's experiences with implementing logins, as we've done recently.
It was quite useful to hear about future plans, and also just to chat to other users. There are more in Glasgow later this month if you're in that part of the world.