There have been anecdotal cases of BlackBerry users so engrossed in pecking out tiny takeover bids on their handheld cellular demons that they fail to notice slightly more important real-world issues such as open manholes, fast-moving juggernauts and one-way streets. Now I'm not saying that navigation software would solve all of those issues, but a one-third improvement isn't bad; that's surely the argument Navizon are making, with their clever cellular triangulation mapping.
Unlike traditional satellite navigation, which uses GPS tracking to ascertain what point in space you're occupying, Navizon uses so-called Virtual-GPS which measures the strength of various cellphone towers to accurately guesstimate your position. That means it works on any network without needing a special GPS receiver - either built-in or aftermarket.
Bundled with navigation-friendly MGMaps, a Java application which overlays the maps onto Navizon's positioning data, the service also offers points-of-interest, buddy tracking and directions.
It's available now for $24.99