New TomToms redraw the map

As great as satellite navigation is, it can never quite keep up with planners' voracious appetite for changing things. Building bypasses, adding junct

As great as satellite navigation is, it can never quite keep up with planners' voracious appetite for changing things. Building bypasses, adding junctions, dumping in roundabouts – how's a humble sat-nav to keep up?Thankfully, TomTom has the answer: it's going to let us redraw maps on the hoof using its Map Share option. So if bollards appear at the end of your street, draw them on. A new one-way system? Not a problem. A whole new motorway? In it goes.As the name suggests, the changes can be shared via its TomTom HOME software, ensuring everyone's nav box stays up to date. Of course that could give nefarious pranksters the ability to pedestrianise the M25, or divert Oxford Street into the Thames, but Wikipedia-style peer review should hopefully iron out malevolence.You can also opt to only download changes verified by TomTom’s team of official white-coated checkers and their clipboards, just to be on the safe side.But don't expect to be able to get meddling straight away. Map Share option only works with the two newly announced releases, the 4.3in widescreen GO 520 and the Europe-wide 720 (pictured), which won’t see your dashboard ‘til later in the year. Both also get speech recognition and built-in FM transmitters for piping instructions through the stereo. Time to upgrade?Essentials TomTom GO 520, 720 Price: €400, €500 On sale: Q3 2007 Contact: TomTom Related stories: Buy Treo, get TomTom free TomTom One says 'super size me' TomTom RIDER gets our motors running