The folks at Earthcomber, the free location-based app for mobile, have let know that they’re going to be busting out a BlackBerry client. Of course, stuff with integrated GPS is on the list, like the 8310 and 8800, but Earthcomber also sports a self-spotting function which lets you designate the city you’re in if you don’t have GPS handy. The program lets you browse through categorized services, like banks, ATMs, restaurants and lists results in order of proximity. Also, they’ve got a proximity detection service which alerts you when buddies are nearby. It’s got a clean interface, and you can’t beat free. Sadly, this is a U.S.-only thing right now, but we’ll be keeping our eye out for a Canadian release real soon.