Last weekend was York LGBT Pride so I went along and helped out for a bit on the bi stall (if you can talk cheerfully and on-topic to strangers, the people who organise those stalls at Prides are always looking for volunteers!)
It was striking just how many bi people there were - lining up sometimes four people wide and three rows deep to take turns to sign up to email lists, take flyers and stickers and bi magazines and the like. I've run bi stalls in the past with hardly anyone showing interest so it was really heartening.
It was fairly busy at Bury Pride a few weeks ago too. I think the bisexuals are coming out of the woodwork more than ever before - it's heartening and I love going home from a Pride stall that we've had to close down because of running out of every single leaflet, pamphlet and so forth we had!