2004 F650GS
Apart from the obvious (new screen, paintwork, etc), the big difference is the return of the twin spark head - needed to comply with new Euro emissions legislation coming into force soon. Hopefully, it will clear up some of the S&S issues that plague the US model (US emissions legislation being already stiffer than those currently in force in the EU, US GS's suffer with this more than those sold in Europe).
It's also supposed to have a better headlight, span adjustable levers, the rear rack doesn't require an adaptor plate to take a topbox, and the inclusion of a BMW power socket as standard.
I've also heard a rumour of a Super Motord version being available, but I can't vouch for the accuracy of that one.
All supposed to be available in Europe around April time. No idea of price.