I too would be interested in hearing from people who have a large population on there site using dolphin. dolphin.us has well ove 2000 users but they dont count.

You always have to think ahead in terms of resources. Current hosting company i'm with doesnt support clustering but at the same time i looked around and not too many offer clustering technology without paying the big $$$.

you have to meet resources with cost. With my current hosting company, they offere 1500gb of storage space at see more $100/year which you need if your running a multimedia site like Dolphin. on the other hand, i have seen companys offereing clustering technology but the storage lspace is ess then 1gb which wont last too long if your seriouse about building a multimedi social/dating site these days.

Again, love to hear from other members who do have large numbers on there dolphin site and there experience with performance and what they did to resolve the problems.
Robin