A little bit a bump but i got some good tutorials for people that want to map for tf2:
http://www.fpsbanana.com/tuts/5570 - mine about making a TC map
http://www.fpsbanana.com/tuts/4620 - Making a CP
http://www.fpsbanana.com/tuts/4566 - Spawnrooms
http://www.fpsbanana.com/tuts/5415 - Spawndoors
http://www.fpsbanana.com/tuts/4565 - Resupply lockers
http://www.fpsbanana.com/tuts/5263 - Observer cams (the overview of a CP when dead for example)
http://www.fpsbanana.com/tuts/4583 - Skybox list (better than the valve developer one as these work and the valve dev ones dont)
And of course, if you are an fpsb member rating a tut is allways welcome for the makers.