The yellow Google Maps Street View person is currently carrying colored balloons and a hat (perhaps in time with Google as a business turning one decade old?):

http://blogoscoped.com/files/google-maps-party-icon.png

http://maps.google.com/?ie=UTF8&ll=39.115411,-94.58293&spn=0.037959,0.077248&z=14&layer=c&cbll=39.099134,-94.585611&panoid=lvYASpO-6wxRoYRjrHsg5w&cbp=1,0,,0,5

[Thansk Gish, http://www.Gish.com.au!]

Or maybe Google maps is just going to indicate where there are kickin' parties!

Well, There wasn't a party where I was going... Just a depressing game of poker!

maps.google.com/intl/en_ALL/mapfiles/cb/party_peg-0.png
maps.google.com/intl/en_ALL/mapfiles/cb/party_peg-1.png
maps.google.com/intl/en_ALL/mapfiles/cb/party_peg-2.png
maps.google.com/intl/en_ALL/mapfiles/cb/party_peg-3.png
maps.google.com/intl/en_ALL/mapfiles/cb/party_peg-4.png
...............................................................................................
maps.google.com/intl/en_ALL/mapfiles/cb/party_peg-15.png

Dang! just found those images too.

Cheers for the mention Phillip.

Just found something similar posted here:
http://googlemapsmania.blogspot.com/2008/09/street-view-party-time.html

[Moved from "Google Birthday Easter Egg" – Tony]

I was using Street View, and look what the little guy has on:

http://img211.imageshack.us/img211/2006/googlezi5.png

Did you guys find any others?