I'm mixed on this one. I like the nWOD a lot- its much stronger and more vibrant than the oWOD, and with no world-spanning metaplots. Its also somewhat darker than the old one- the characters aren't as superhero-powered as they used to be in oWOD, and the source material is more realisitc. The new system is great too- very solid and plays great out of the box.
On the other hand, its Monte Cook. Some of his stuff I like (Chaositech, some stuff in Ptolus), but most of it strikes me the wrong way and/or isn't my gaming style. I'm very hesitant of a D20 version of WOD, just because its more than likely to turn it into D&D with characters as vampires or werewolves (that is, all the abilities and feats based and balanced on combat usefulness rather than on roleplaying considerations AND some combat like nWOD is). Plus the difference between a leveled vampire or werewolf and normal person is going to be INSANE in a D20 version of the game- the vampire or werewolf could literally mow through hundreds of people with litte worry unless they used fire or magic. Blah- we have that with high-level D&D already. This is speculation of course, but if it uses normal D20 mechanics (even D20 modern), its a likely scenario.