We do charge a nominal presentation fee, currently at $1000 in Denver. We don't, however, charge any application, screening, or success fees, or take any back-end participating interest in the deals. Fees are fairly common in organized angel groups, and I appreciate they aren't always popular with seed stage companies. Since we are more typically dealing with later stage deals with larger raises and have a pretty high rate of funding companies that make it to the Forum, our member-invested companies see the value. See http://www.k4seattle.com/docs/K4-TopTenTips.pdf
for one successful presenter's viewpoint.