This upcoming weekend is a HAM fest at Tymor Park 249 Duncan Road LaGrangeville, NY on April 29th. I'm planning on going around 8am (when it opens). If anyone is going, send me a text 917.806.6210 when you get there if you want to get a coffee or something. http://wr2abb.org/home/wp-content/uploads/2012/01/MBARC-2012-hamfest-Flyer3.pdf
May 1 and 3, Boston or Baltimore FPGA training, see my other post about this
May 19 and 20, Maker Faire in San Mateo. I know this is not local, but if you are going to be in the area...it's totally worth stopping by. I'll be there!
May 19 and 20, NYC Interactive Show at NYC Resistor (Bklyn hackerspace). There are still a couple of spots open to show your projects off, or you can just go and check it out. http://www.nycresistor.com/2012/04/18/last-call-for-projects-for-the-interactive-show/
Know some other events? Please add them to this thread!