As part of an internal "learn at work month" program, myself and a colleague have volunteered to do a presentation: "The Wonderful World of Web Maps".
To this end, we're now looking for examples of wonderful, weird, functional, beautiful, and just plain awesome web maps that are out there. Any online map that is either interactive or dynamically updates itself would qualify.
Part of this question is already answered with the What Makes a Map Beautiful? question which has some-web maps as does What Makes a Map be classed as Badly Designed? but we're more interested in a diverse range of maps rather than just the beautiful and bad.
I've done a little searching and come up with a couple (that just happen to have a transport theme) like:
What other web-maps are out there that might warrant demonstrating or could use wider exposure?