Sogudi is very similar to an application by [Brent Simmons][1] called [Huevos][2] but it’s much more tightly integrated with [Safari][3].
It basically provides URL shortcuts from the location field. It comes with a bunch of defaults and 2 that I quickly added were the following.
fedex http://www.fedex.com/cgi-bin/tracking?action=track&language=english&cntry_code=us&initial=x&tracknumbers=@@@
maps http://maps.google.com/maps?q=@@@
Yes, you read that last one correctly, [Google Maps][4] have now come to Safari.
[1]: http://ranchero.com
[2]: http://ranchero.com/huevos/
[3]: http://www.apple.com/safari/
[4]: http://maps.google.com/