Here are some sites that might help you out:
http://8up.com/phpbb/ - This one is show mostly FL events.
http://www.euphoriaproject.org/#epevents - This one is based out in South FL, but has a lot of info on upcoming events
http://www.groovetickets.com/ - This one sells tickets to big events nation wide.
I'm not sure what the scene is like in North FL but I do know Central and South FL you can find some good parties. I don't think we're going to see any BIG events come up till after June. Right now is a bunch of small to medium events. Although I could be wrong. It looks like all the BIG parties are happening on the West coast.