Google continues to rise in value, at least as far as the stock market is concerned. Since the company went public, their value has continually increased, with this week their stock hitting a high over $600. That's a significant chunk of change to get stock in any company, and some investors say it won't stop there:

Analysts began predicting Google's stock would reach $600 at the start of 2006 when the shares were still hovering around $420. Some analysts already are advising investors that Google's stock will hit $700 within the next year. The average target price for the stock is $606.61 among 28 analysts polled by Thomson Financial.
But where will it go after that? Even though their acquisition of DoubleClick may even further boost the company’s assets, one can't help but wonder how much longer Google's exponential rate of growth can continue. Inevitably, there will be a slowing. The question is, once the slowing begins will they be able to keep themselves a cut above their hordes of competitors (Namely Microsoft and Yahoo) enough to maintain their value?