Part of my new gig at Jive is to be an evangelist for our products.  This means that I need to ramp up my speaking schedule at conferences.  Historically, my typical method of getting speaking engagements is to reactively respond to requests from friends, industry acquaintances, and other random people who invite me to speak on panels.  Now, I want to start taking a more proactive approach by submitting sessions to conferences focused on developers, web 2.0, collaboration, community, and open source.

Any suggestions for cool conferences that are currently accepting submissions?