I've used many of the Web 2.0 winners sites many times. Youtube is great, especially when you're able to download the material(just need the right software). I downloaded a video on how to open a locker and used it to show students. There are SO many educational videos on Youtube, you just need to make sure they are appropriate. The google maps, I've used it to create routes for me to run, and find out the distance of some routes I want to try.
A few sites like google maps is what Nike Plus and MapMyRun offer, you can see the routes other runners around have done.
Like Google Docs, Microsoft has an online service where you can look for other templates people have created and posted for others to use and rate. I used it last year to find my school a new referral, there was one already completed, I downloaded it and changed it to fit my school.