Mimieo Corp has developed technology that allows customers to give real time feedback on devices such as the iPhone and just about anything else that will connect to the internet. I really like taking advantage of this technology but rating communications on a "liking" scale may not be the appropriate way to measure all brand communications.
We're still in the infancy of using this type of technology and it's probably the first step of many to come in quantitative market research. When used appropriately I can see it being a useful tool.
To learn more go to http://www.mimieo.com/