The Google Lat Long Blog has just announced a really cool new feature with Google Maps called "Explore this Area". According to Google, "you can explore an area by viewing photos, videos, user-created maps, and suggested local queries." This is a good example of how interesting mashups can be.
I've often surfed around to places I've been with Google Maps and this adds a whole new level to the amount of fun you can have. After clicking on the "Explore this Area" button, click the "More" button in the map and check on wikipedia and photos. This will bring up even more photo and wiki entries. I did a search of my home town of Clonmel, County Tipperary, in Ireland. The search brought up a lot of my old haunts and some great memories... try it out!