iphone applications

Thought this was pretty cool and easily something you could do for fun when you are bored! http://mashable.com/2010/10/17/iphone-space-launch-video/

Seeing Steve Jobs just unveiled the iPhone 4 i've seen a small handful of sites offering App creation.The one I came across was http://freetheapps.tk saying it is fairly easy to create these apps. My question is has anybody here made good money creating iPhone apps and are these apps easy to...