I have an iPhone, but I have never been able to convince myself that learning a new OS is a good thing for long enough to use a Mac. Some people love the Mac OS though and have a particular fondness for the iMac.
If you are the iMac type, this rumor is just for you. Engadget reports that Apple is said to be working on a 22-inch iMac computer set to debut sometime this year. According to reports, it will be built by Quanta like the other iMac machines.
The screen size would fit well between the 21.5-inch and 27-inch models, but why bother with only a half inch extra space? No details are available on the rumor at this time.