Google announced last night that they will be tracking flu trends and I think this is a public service. You can find the actual Google Flu Tracking page here. You can sort by state, roll over the US map by state, find flu shot locations, and recent Google news about the flu. People - THIS IS A PUBLIC SERVICE for you. This isn't personalized to you. It is aggregated data and publicly available. If you have flu like symptoms and search on it, then there are other people searching on it in your area. I'd like to know if there is an outbreak of flu in my area so I can take proper precautions. Don't you?
Does it seem like big brother Google is watching you? Yes, but you use their services for free, they have a customer agreement which you agreed to by usage, and as long as they anonymously aggregate the data than it is OK to make available. Clearly there needs to be checks and balances on protecting the personal data - but that's just not related to flu searches.
I watched Fox and Friends this morning and they seemed scared of it? Me - I think it is a public service.