In the second review of the number of developers publishing applications on the iPhone App Store, it's amazing to find that the growth is so linear you could almost use it as a straightedge. In fact, the number of unique publishers has doubled over the last 6 months, now approaching the 18,0000 mark. Where admission into the Apple Developer AppStore program was once a bottleneck in getting an App to market, this is no longer the case. One could predict that in the next 6 months there could be upwards of 35,000 developers, a considerable technical force to be reckoned with.