Listen Up! looks like a pretty cool website for aspiring teen filmmakers and animators. It reminds me a bit of TakingITGlobal, in that it offers networking opportunities so youth can connect with each other.
Listen Up! also offers kids a free venue in which to show their work and obtain feedback from their peers. The site has a list of potential funding sites as well as links to grant-writing tools, so that aspiring filmmakers can apply to obtain the money they need to create. Also provided are list of film festivals and "calls for entries" to which youth might submit their own films. To their list I would add the After Hours Film Society, a local group in Chicago's western suburbs that has an annual student film festival: http://www.afterhoursfilmsociety.com/sffest.htm
The Research Links section of Listen Up! has an extensive list of links for learning further about various issues of concern for youth, including environmentalism, health & safe sex, animal rights, cultural diversity, violence, substance abuse, and general media topics.
If you know of any aspiring filmmakers, this looks like a worthy site to pass along.