Overhaul, site linking, forums, etc
Some major overhauling done in the last few days.
1) You can now register for an account. While much of the functionality here is still under construction, the main advantage at the moment is access to the forums, and having your profile included in the advanced stats, since some people don't like joining groups for some reason.
2) Profile pages now have more detailed graphs on a per-class basis. I've also overhauled the item system so it displays attributes and other bits now. It should update much quicker as well.
3) Integration with Source Tools. Much of this is still a work in progress, but we're working toward providing Steam Cloud-like access to your blacklist and favorites. This also includes showing your favorites on the server tab (You can add them on server info pages, but you'll be able to sync your list from tf2 soon). This is in it's infancy, so more will come soon.