According to International Crop Circles Archive (ICCA) appearances of crop circle formations worldwide are increasing and now capture imagination even of the "mainstreamers".
It would be a good idea for a big brand to sponsor a piece of land specifically designated for communication with extraterrestrial intelligence through crop circles medium.
By this I don't mean "shaving" a huge brand's logo on the crop field or anything like that. The project should not be a gimmick but rather an experiment with an objective of possibility to
establish a meaningful dialog with ETs.
From a marketing perspective the project would contribute to the brand's progressive image (open-minded, forward thinking, etc.)
i.e. below is an example for Apple brand (since they claim: Think different)
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I can't imagine Microsoft doing it, but if it did, it would definitely help the brand to change it's rather uninspiring mainstream image into a more forward thinking and progressive... as well as winning hearts and minds of millions of crop circle enthusiasts worldwide.
Other potential sponsors who'd benefit from this idea: BMW or Mercedes, Google or Yahoo, Shell or alternative energy groups, etc.