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In Chapter 9 of More iPhone Development, we wrote a set of classes that mimicked the behavior of GameKit's peer-to-peer connectivity, but for regular network connections (GameKit's only works with BlueTooth and local network connections). Basically, we wrote a class that lets you send and receive anything that can be packaged into an instance of NSData. Since it's relatively trivial to implement NSCoding for most classes, this means passing objects between two iOS apps (or an iOS and a Mac app) becomes pretty easy. You don't have to poll for the data, or worry about chunking out the data. You just make a method call and pass an NSData instance to send data, and then implement a delegate method for receiving data back from the other end. Life is good, right?Hmm...Maybe not. There's a pretty...
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