It's true that iOS4 and Android are the mobile operating systems of the day. But MeeGo, a mash-up of Intel's Moblin and Nokia's Maemo OSes, could be a strong contender. Based on this demo, at least.
It's been less than a year since Apple launched the iPhone App Store, but now virtually every mobile OS is showcasing its own take on the mobile application storefront. How do they all stack up?