Is it just me, or are Gmail Labs on fire this month?! I don't think my Gmail has ever looked so good or functioned so well thanks to all of the new lab offerings. For all of the avid travelers out there, the latest lab will add your geographical location to your signature so your email recipient will know the exotic location you sent it from.
To take it for a test drive, enable the Location in Signature Labs tab under settings and then check off the box "Append your location to the signature" in your signature preferences. And if you have it turned on and there's an email or two that you don't feel comfortable attaching your location, you can always delete it.