Every car featured in this year’s Gumball Rally will be equipped with a T-Mobile MDA Compact III manufactured and sponsored by HTC. Each T-Mobile MDA Compact III features built-in GPS receiver for use with Satellite Navigation software – so all the Gumball drivers have at least one navigation device to their disposal.

To celebrate their sponsorship of the 2007 Gumball Rally, HTC is giving you the chance to win a HTC GPS device on their site. To win you have to either get the fastest course time on our Gumball Rally Challenge game or enter the HTC prize draw for the chance to win the PDA used by Jay Kay of Jamiroquai. Both competitions end on May 7th, with the winners contacted via email about their prize.