The first solution is a direct swap where owners can trade in their existing iPhone and get the second gen version for 50 euros.
The other option for those who would to keep their current iPhone, but also want the (supposedly) 3G version means they can buy the new model enjoying a "generous" discount.
Apple's 3G iPhone is expected to be announced at WWDC. Given Apple's preference for secrecy, it would appear as though such solicitations are being made prematurely.
[ via Sky News ]