Exporting Animation in 2.5

Hi! I’ve had a really smooth time in blender 2.5, but I have one major problem:
I have some of my animation all finished, and I want to know how I can save/export it as a video file (quicktime, avi, so on). I’ve tried everything, but I can’t find out how. If anybody knows, can you tell me? Thanks! Help is much appreciated!

in the properties window, click on the camera icon