An EclipseCon is the perfect event to connect with other developers, learn about new projects and technologies, and get the latest updates on the hot topics in the community. I know this because I've attended every single EclipseCon Europe so far, have been to most of them in North America, and now I'm looking forward to traveling again to Toulouse. The program committee's selections look very promising!
But, I still remember how it feels to be attending this kind of event for the first time: unfamiliar faces, far too many talks to choose from, etc. And this is where the Mentor Meetup comes into play. You can get in contact with others in the Eclipse community, chat a bit, connect with speakers and other committers (and I've heard rumours that there will be some drinks... for mentees and for mentors!)