Dynamics AX 4.1 renamed to Dynamics AX 5.0

I've just read on the UK partner website that AX 4.1 will be renamed to AX 5.0. The scheduled release date is Q1/2008 (well it says 2008 but I've read somewhere that it could be released in Q1). There should be more info on Partnersource, but I don't have access to that.
Link: https://partner.microsoft.com/UK/40032627