Congratulations to all who have the game unlocked and are playing, and good luck to all those still waiting!
If you're looking to get straight in to modding Skyrim then you'll be wanting to get your hands on the SDK that Bethesda have dubbed the "Creation Kit". However, Bethesda, as is their way, are not pinning any specific time or date on a release of the Creation Kit so we're going to have to sit-tight and wait patiently.
Bethesda have just opened up their mod subforum on the official forums. Pinned at the top is a little note from community manager GStaff on the matter:
The team is working to get it released as quickly as possible. As soon as we have more information to share, we'll let you know.
In the meantime, we hope you enjoy some research while playing through the game. Feel free to use this board to discuss the modding projects you're thinking about.
That implies to me that it's going to be a little while yet (whether it's days or weeks, I couldn't say), but they'll come up with the goods eventually.
So, in the meantime, you can either play the game, or come up with your own ways to tweak the game and share with others. There are already a couple of these tweaks in the mod database
. Oh, and don't forget to share your glorious screenshots of Skyrim with others in our Image Share