I thought I'd already posted my links, but I guess I didn't.
Here's my multi-fandom fanfic archive:Writin' Across Universes. It includes all my Star Trek Enterprise stories and drabbles, Stargate Atlantis stories and crossover stories (ENT, SGA, Doctor Who, Top Gear, Torchwood).
And here is my AU series for Enterprise: Switcheroo Series. This started as a challenge from a friend: write about the crew, but in different positions aboard the ship, but keep their personalities and relationships (somewhat) intact. The series is about a quarter through 'Season 1' with this AU's version of Two Days Two Nights coming up.