Gizmodo, a source very, very close to the 3G iPhone launch has told them that new eagerly awaited handset is set to be launched during the keynote speach by Steve Jobs at the WWDC in San Francisco on June 9th
This is so far only a rumor, but it makes a lot of sense, as this is a big event for Apple and the company always unveils new products during the show. Again, according to Gizmodo, the new 3G iPhone is set to be available world wide right after the launch, although they're also saying that it will be sold in a different way than the original iPhone in some countries.
What this means is that the 3G iPhone won't be sold at a fixed price point in those countries, which might be the same way most mobile phones are sold in countries like the U.K. In other words, the more expensive tariff you choose, the larger discount you get on the handset.
Time will tell if Gizmodo is right, but with less than three weeks to go, you won't have to wait too long to find out.