Marco.org

[…] the firmware contains references to an updated version of the iPhone’s communications chipset. This updated chipset adds support for 3G networking, including WCDMA, the 3G flavor used in Japan and Korea. In addition, the chipset supports features like live recording and two-way video calls. It’s not known if or when developer access to any of these features will be enabled by Apple, but it certainly gives rise to the notion that some very useful applications could be coming our way. This reference to the updated chipset certainly indicates (and to some of us, practically guarantees) that we will see updated 3G-capable iPhones when the 2.0 firmware is officially released in June.

This makes a lot of sense, and seems to be in line with most reasonable assumptions that the next iPhone update will be released at WWDC (June 9).