Portable ways to find a potty...
iPhone and iPod Touch
SitOrSquat is available for iPhone and iPod Touch. Type SitOrSquat in the iTunes Store or click the link above and choose the download link. Click above from a details videos and instructions.
BlackBerry
SitOrSquat is available on all BlackBerry's running platform 4.2 or newer (that's pretty much any blackberry in the last 4 years). Click above from a details videos and instructions.
SMS/Texting
Text message the word "sitorsquat" to DOTCOM (368266) and follow the instructions to find the closest bathroom to you. Click above from a details videos and instructions.