There is no 30.30 download available at the nVidia site! The last one they have that I can see is 29.42, which I tried downloading and installing again just to see, and it prevented Windows from booting! I even did a search on their site for 30.30, and it returned 0 results.
As for the driver version, Windows will only tell me the date, which it lists as sometime in september last year. This makes no sense to me.