I noticed that Infiniti has released most of their 2008 cars, except for the M35 and M45 (their website only shows the 2007 still). Is Infiniti going to make a 2008 M class?

Yes Infiniti is going to make an 08 M class , but it is going to be slightly different than the previous model M classes. they are changing the shape of the headlights and tail lights slightly and giving the car new wheels, which is most likely prolonging the car from coming out, vs. the other infiniti's which are carry-over models of last year, which come out sooner.