It's a little late, but technically it's still xmas today, so I'm happy to give you Markdown todo lists in WikiPack!
You can read a little about them on the WikiPack home page, but basically they work much like this video made while they were still under development:
Todo lists are available on the Personal plan, which is still free until we get WikiPack hooked up to a cash register. (It’s on my list of new year’s resolutions…)
Have a safe, & productive new year
So I hope you find them useful, and enjoy making the most of Markdown todo lists to be more productive in 2013!
