Wirelessly posted (BlackBerry8703e/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/104)
In addition to US (NY)/Canada (ON) at at least four different locations, and US/Mexico at San Ysidro/Tijuana, I've also done Sint Maarten, Netherlands Antilles; and Saint Martin, French West Indies.