For the past few years, the annual conference of the Federation of Genealogy Societies has been the largest genealogy conference in North America. I have enjoyed attending this conference and I expect this year's event to be at least as good as the past few. This year's conference will be held in Philadelphia on September 3 through 6. You can read more about this year's conference at http://www.fgsconference.org.
One note was issued today by the conference organizers: online registrations and changes will close at 5:00pm CDT, Friday, Aug. 22. After that, any changes to your current registration or any new registrations will need to be handled at the Conference.
You might want register NOW at http://www.fgsconference.org.