Yeah, I've never heard of it either, but you do have to take into account that google has a lot of fans that live, breath, and won't shut the fuck up about anything google.  Remember that weird pixel that showed up on G-mail a few months ago?  Probably not, I'd never notice it either but there were like 6 front page stories on Digg.com either about it or just purely speculating about it.  A pixel.  I think we might just unknowingly tune these people out.