I just got back from Chicago, where I attended a meeting on the upcoming annual conference of the Alliance for Nonprofits and the National Conference of Nonprofit Associations, which will be held in Chicago July 14-17.
I've seen the full agenda, and it is chocked full of great materials, workshops, discussion groups. If you are interested in nonprofits and their development, this would be a great way to spend three days of your summer. You'll come away with your brain full of new ideas, and having done some great networking as well.
Information on the conference, and the full agenda are at www.allianceonline.org/annual_conference/2005_conference.page
Take a look.