So I can really see the utility of this kind of thing - and, frankly, it's better for not focusing on just one edition, or just the free stuff or whatever. There's good ideas to be had in every edition, so I pull free adventures whenever I can (I think I have everything from the Wizards site - even the Ravenloft stuff that I don't think I'll ever use as is).
I've bookmarked the site (not that big a deal, I have hundreds of disorganized bookmarks) but I think this is one I'll go back to again and again - in fact, I'm going to put it in my links section on the blog.
***EDIT: yep, spent an hour or so on the site - it's a beginning - but it's a 4e focused site so, while there were a few oldies that showed up (Village of Homlett and Palace of the Silver Princess & others - oddly, not everything that is available for free even from the WotC site...????) So, it's a site with potential, and I'll keep the bookmark and be cautiously optimistic that it will become a more comprehensive sites