Who fans: What about some other spin-offs?

We have Torchwood, or "The Captain Jack Adventures". We're gonna be getting the "Sarah-Jane Adventures". Which other companions would you like to see have adventures of their own? I'm guessing many people would tune in for "Rose Tyler: Defender of the Earth" - a once-discussed spin-off from the recent series. Any other who fans want to catch up with their fave companions' lives after Who? I'd love to see a televised version of the Gallifrey audio adventures, personally, with Romana and Leela. The Liz Shaw Adventures? Tegan's Travels? Susan Foreman: Timelady on Earth? Any other favourites out there that deserve a forward-going story?