Just half an hour to go until Apple's press conference to launch the UK iPhone kicks off, but it seems 3G won't be on the menu. TheStreet is reporting that a 3G iPhone is being developed, but won't go on sale until the first quarter of 2008. However, the silver lining is that the handset is set to include GPS for beefed-up mapping and navigation services. To be specific, Broadcom's Global Locate is apparently supplying assisted GPS chips for the second-generation iPhone, which should make it quicker to get a signal than pure GPS.