Not sure if this is posted in the correct section but full details are available on the link.
Will be available from the 17th June
The free iPhone OS 3.0 Software Update includes some great new features, as well as all the features from previous updates. iPhone OS 3.0 also lets you run the next generation of iPhone apps, like peer-to-peer games1 and more. If youve never updated before, now is the perfect time.