Bethesda loves modders! They have announced that they will be releasing a Creation Kit for Skyrim on the Bethesda Blog. Also check what Gstaff has to say at the BGS Forums: "Yes it does. We've always been impressed with what the community has done with our tools. Like the Elder Scrolls Construction Set for Morrowind and Oblivion, we plan to release Creation Kit so you guys can mod Skyrim."
Oh, Bethesda, how much do I love thee? And how much does my fiance dread this coming November?!