Question – does this informal “voting” for sites have an affect on natural search results seen by people who are NOT logged into their accounts? Does this commenting show up? If so, Google will need to consider that there are a lot of people who will quickly figure out how to game this system… User generated content (UGC) cuts both ways – and adding it into the search algorithm, even if it is minor, could have a significant affect on the way that natural search results are accessed and optimized for. According to an interview in the Wall Street Journal, Google will not “initially” base search results on voting or comments – however with all of that great data at their disposal, will it not be really tempting to have it influence ranking to some degree?

Interesting addition – but I am really concerned about whether people will “game” this system (seems like the Black Hat Killer App!).

Here is a screen capture of how the votes and comments appear when you are signed into your Google account.