Google's Caffeine update is now underway, they have started showing Caffeine results @ 209.85.225.103. Apparently the new results only show about 50% of the time, but if you keep refreshing you can see the difference in results.

To do a search go to: http://209.85.225.103/webhp?hl=en&btnG=Search After you get the results change the www.google.com in the URL to the IP address to make sure you keep getting Caffeine results as you go through multiple pages.