Sticking to the schedule of bi-weekly releases Apple has today given iPhone developers access to the latest version of iPhone OS and SDK.

Beta 3 of iPhone OS and SDK 3.1 labeleld builds 7C116A and 9M2808 respectively bring Apple one step closer to the release of 3.1 which is slated for a mid-August debut.

iPhone OS 3.1 has so been very much a minor update adding very few new features, it is currently unknown what changes beta 3 bring.