Bethesda included a little something extra when it released the Skyrim mod tools today: a high-res texture pack. The texture pack is available on Steam as free DLC. To get the Creation Kit, you'll need to set your Steam library to show tools instead of just games. The Creation Kit should appear on that list if you have Skyrim installed.
Kotaku says the Creation Kit and texture pack weigh in at a hefty 3.1GB, so you might want to get an early start on downloading. Unfortunately, few details are available on the texture pack other than a note suggesting your PC exceed the game's recommended specs, which call for at least a gig of graphics memory. Since Skyrim performs pretty well on mid-range graphics cards, folks with decent graphics hardware should be able to run the texture pack without suffering too much of a performance hit.
Skyrim isn't really my kind of game, but I've gotta give it to Bethesda for supporting PC users with a texture pack and mod tools. It will be interesting to see how popular Skyrim mods become once they have the weight of Valve's Steam Workshop behind them. The Workshop should allow folks to easily browse and download mods from within Steam, eliminating the biggest hurdle to sampling user-created content.