Richard Rusczyk, co-author of the Art of Problem Solving texts and former Math Counts participant, gave a one hour lecture in November, 2009 on mathematical problem solving, resources, and opportunities for gifted math students. You can view his presentation here.
I loved this YouTube video entitled, Outside of the Box Gifted Learners, which is from a 2010 IAGC presentation about meeting the needs of diverse and twice exceptional gifted kids.