iTunes AppStore recently achieved another milestone with 40000 apps existing for the iPhone/ iPod touch (though some of these apps are currently inactive, taking the effective number down).
Apple has also made it clear to its developers that all app submissions henceforth need to be compatible with the New iPhone OS 3.0 beta. While all the previous appstore apps for V2.x should be automatically compatible with the new OS, developers have been advised to check their apps for OS 3.0 compatibility.
Break ok of App Store Apps by category