June 8 seems to be a good day for mobile Internet browsing, especially for users of Windows Mobile-powered smart-phones. As it was rumored yesterday, Opera Mobile 9.7 beta has been released for the platform today, bringing along a number of improvements. First of all, the developer says the speed of mobile surfing has been greatly increased, thanks to the Opera Turbo technology. In addition, faster page loading and better overall performance should come with the integration of the new browser Presto engine, version 2.2. Opera Mobile 9.7 beta also adds widget support.