AOL Search and Comcast Search are both showing results from Caffeine and they are both also internet service providers.
Could these two things be related?
im not seeing caffeine on aol or comcast ATM.
You searching on AOL or Comcast websites will not provide a data trail ... if you are a subscriber to AOL or Comcast however you may be seeing different results if AOL or Comcast are actually in cahoots* with Google to provide extensive user data of beginning-to-end user interaction with Caffeine.
It might help if the people that reported seeing caffeine on AOL or Comcast confirmed if they were subscribers to that ISP.
*Disclaimer: I'm not saying they are, this is just a hypothetical as to the pattern of the current caffeine roll-out.