While i understand people that are waiting, i think that if that's happening the in the UK then it's a really good time to buy a 312R or swap you "old" S for one.
The new MV that will substitute the F4 will only be out by 2009/2010 so there's still plenty of time to enjoy your new 312R or to wait sitting on the money if that's your option.
Also, for those who are waiting, just think..... what if you really dislike the new coming MV??? You waited and waitied for something you don'y like and you're not buying.
I bougth my 312R back in May and all the rumours about the new MV were already out etc... but i didn't care a bit, because i want to have and keep forever (if i can afford) an MV F4 in my garage.