Apple has launched the iPhone in 21 more countries, bringing the total to 43. Reuters reported that Russia will also get the iPhone in October 2008, and we're sure additional countries will come online as Apple negotiates deals with local carriers. Apple's plans for world domination are well underway.

Much has been made about the fact that the iPhone will now be available to 660 million potential customers, but that's pure hyperbole - there's no way to know how it will sell in any given market or what deal Apple will strike with local carriers. What I'll find more interesting is the effect on sales in the App Store; increasing the iPhone installed base by even a million here or there could result in significantly more sales for individual apps.