Have you had a chance to check out
It’s a big call, but I think this is possible my favourite Google Maps mashup to date.
Platial allows you to create your own maps using the Google Map interface, as well as add to other people’s maps. You can map *anything* you like. So, because it’s about people making meaning with maps/places, you end up with some really interesting content.
Some of the maps are very personal – trips that people have taken, places they frequent regularly, places they’ve had car accidents. Others are useful community tools – Stereo shops that don’t suck, restaurants, commuter public transportation, band tour maps. Here’s a little sample: