Is this actually also the long-awaited fan-site policy? Does it actually address fan-created material other than to say "use the GSL" and reference WotC trademarks?
The most relevant part is this:
"Please note that this Fan Site Policy does not allow you to publish, distribute or sell your own free-to-use games, modules or applications for any of Wizards' brands including, but not limited to, Dungeons & Dragons and Magic: The Gathering. If you want to engage in any of these activities related to Dungeons & Dragons 4th Edition, such use is subject to the Game System License http://www.wizards.com/default.asp?x=d20/welcome."
Also:
"You may not publish, display, exhibit or use any information about products (including any photographs, game text, rules, or drawings of such new products or their prototypes) that has not already been released to the general public by Wizards or that Wizards has otherwise expressly authorized for release to the collector community."
And:
"We encourage you to use these materials, post your character sheets for Dungeons & Dragons®, create fan fiction, display your personal artwork, and just have fun on your Fan Site."
The pack is a lot of image files (logos, book covers, etc.) to use on your site.
Cheers!