Forum Moderators: Robert Charlton & goodroi
Google seems not only to be updating their algorithm in complex ways at this point, but also changing over to a new spidering technology.
There's nothing much for it but to wait and keep on improving your site -- and know that you're not alone. One of my clients is still not showing on Google after 7 months, but their website is now profitable just from Yahoo traffic alone. So it can be done, and then whenever Google jumps in, the extra will be like found money.