GeoWeb stuff

I've started messing around with Google's latest mapping "stuff"...picked it up by reading this Google Blog. Went out there and created my own map. This whole geospatial topic and subject I'll be exploring a little more. If any of you can point me to some cool web sites I'd appreciate it. I've heard of some really neat mashed maps...i.e. taking traffic cams and annotating them via the Google Maps API. Been looking for some of these custom built maps to see how some folks have used these tools...can't seem to get to them. Also, the "My Maps' features are awesome but it does lack some features that I couldn't see at first glance...like adding pics/video/podcasts...to points on the map. Again, I'm sure someone out there knows where I should go...