Apple just changed a major policy of the AppStore submission process! As per the change, they are now approving apps on 3.0 compatibility basis instead of 2.x.x.
This a great effort by Apple as soon the 3.0 will be released and this will help developers to be ready beforehand. On the other hand, it is a big blow to those devs who haven't purchased the $99 developers program yet as they might be offering free apps only.
That being the case, if you are in process of submitting an app to the store, wait for a moment and check if it works with the upcoming version of the OS.
P.S. Apple will be removing any incompatible apps currently selling on the store. Therefore, to avoid any loss of sales, update your app now!