I looked into it, and also into porting our android app over to iOS. iOS apps are written in Objective-C (I don't think you can do it in java), where Android is in Java (you can also do it in C/C++). You have to pay a fee (yearly i believe, about $100) to even get the iOS SDK, then you have to get it approved and all that fun stuff.
Download and install the java jdk, android sdk, make apps. To publish apps on the Android market is a one time fee of I think $30 and you can have as many apps as you like. Also, Android is now the 2nd largest mobile OS in the world with over 25% and catching up to symbian fast, where iOS is only 16% in world market shares and dropping.
So not only is it easier to start, but it's a larger and growing market. I also only know java and C++ and not Objective-C so it's better for me in that way too.