There's a cool new feature in Gmail Labs which allows you to include your location in your e-mail signature. It determines your location by either reading your IP address and estimating or if you install Google Gears' location module it can give you Wi-Fi triangulation which is much more accurate.
This location signature feature is pretty neat, especially if you're on vacation or just an all around global trekker. But does anyone else think there should be an Android equivalent? Or is Google Latitude enough?