I saw my first 2008 RX350 today. I would not have been able to tell it was a 2008 except for the window sticker. If there are changes, they are really subtle. It did not have the keyless start nor vented seats. Wheels and tires were the same as the 2007 with 18" wheels. Posted mileage was 17/22 which reflects the effect of the new EPA test method. I'm disappointed!
Steve

here is a thread with the details about the changes to the 2008 model. very minor, to say the least.

http://sr1.clublexus.com/forums/showthread.php?t=260505

Yes, I'm quite surprised, read that VERY surprised, that the new DFI engine aspect isn't included.

Changes are very subtle to last 2 more years until the new RX comes.

Just saw the Brandy Wine Mica color at the docks... hot!

Wow, the '08 came out fast; they must be in a rush to get the '09's rollin'! I know I'm impatiently waiting and excited...

The most obvious thing to me are the chrome door handles...a nice upscale touch. Of course we're all expecting big things from the 3rd gen RX hopefully next year.