Gizmodo heard Apple will announce the 3G iPhone at the WWDC Keynote on June 9th.
We all suspected it, but now it is confirmed: someone very, very close to the 3G iPhone launch has told me that Apple will announce their new model at the WWDC Keynote on June 9th. The second-generation iPhone will be available worldwide right after the launch, and not at year's end, as previously thought. The new model will also herald new sales policies in some countries.
In Spain, for example, the 3G iPhone will be available for sale at the June 18th grand opening of Telefonica's megastore—an Apple Store-like shop located in the company's historical building in Madrid's Gran Vía— with nationwide availability the next day or after a few hours. The other European countries with iPhone availability will have similar launch schedules.
According to another source involved in the launch, the 3G iPhone will no longer be available at a fixed price point—at least in some countries, and its launch will also bring new sales policies, although these have not been completely specified yet.