I posted a Gantt chart of mine a while back for FRC team 935 (RaileRobotics). It's amazing how much I have learned about project management in the past six months. This particular chart focuses on every activity we will perform during our scheduled build season, so milestones aren't grouped to each individual project for that purpose. Most of these tasks have assigned resources, which brings up a point that is very humorous yet daunting: there are ALWAYS key people that need to be over-allocated.
This monstrosity took me a lot of time to make, and I am always adding to it. I used Microsoft Project 2010, which our team is very grateful to have. I
really would like to see what
other people have come up with organization-wise, and I don't care what program you use, either. Show us your plans for build season!
Link: http://i.imgur.com/OnOlU.gif
The most important things for a team to take to any competition are a sense of humor, a big bottle of Advil, and a camera!
- Rick TYler [more] 
Gantt Charts/Timelines for your build season. Post 'em!
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