Can I make mods for Skyrim?

The creation kit has now been released and can be found on Steam.

When we created Skyrim, we set out to make the largest, most engrossing role-playing game we had ever attempted. Now it’s about to get a whole lot bigger, thanks to our amazing modding community.

Mod-makers have a long history with Bethesda Game Studios, bringing to life new quests, locations and characters, as well as making changes to game from subtle tweaks to full-blown overhauls. With the Creation Kit, the same tool we used to create Skyrim, there’s almost no limit to what can be accomplished – and we’re putting that power in your hands. Best of all, access to the Skyrim Workshop and Creation Kit is free for anybody with a Steam account and a copy of Skyrim.

With the Skyrim Workshop, finding and installing your favorite mods is easier than ever before. Mod-makers will also enjoy a streamlined process for uploading mods directly to Steam.

Here is a link to the steam workship for Skyrim.

Source: Creation Kit Wiki