AAPL's PE ratio is high (~38), but the company seems to be able to keep very profitable. The upcoming 3G iPhone could be another hit since some people do hold off buying an iPhone right now.
I hope they will also release a cheap version of iPhone - like the case of iPod Nano, then they will be able to dominate the cell phone market.
In business world, there may not be a lot of companies favor Mac, or the worse scenerio is most of home-brewed internal program is for PC only, but corporates are realized the image of their people carrying a Mac Book is much cooler and more professional than carrying a HP Notebook (Apple did spend a lot on building this image), they are gradually including Mac in their business environment.
Apple's capability to persude Media companies to release digital movies, the same day the physical movies released, is definitely awesome. It will help the sales of Apple TV and get more profit from iTune.