I've posted about Accessorizer before. It's just been updated to version 1.5, incorporating a new feature that sprang out of a feature request that was made by yours truly. Actually, it was more of an off-hand comment then a feature request, but Kevin Callahan, the brains behind Accessorizer liked the request and jumped on it with gusto.
The new feature? Accessorizer now has the ability to auto-detect classes that are commonly used as outlets and, if you want it to, will add the IBOutlet keyword automatically to the generated property statements. I've been beta testing this new functionality, and works pretty darn well.
If you do any significant amount of Objective-C programming and haven't tried Accessorizer, I'd really suggest giving it a try. In the application I wrote today for More iPhone 3 Development, I'd estimate that Accessorizer saved me at least five minutes of typing (not to mention greatly reduced the chances of mistakes and typos). I typed in only my instance variables, then a few short keystrokes and about twenty seconds later, I had my property declarations complete with IBOutlet keyword where needed, @synthesize declarations, and both NSCoding methods. You don't have to write too many classes for it to pay for itself if you do this for a living. If you're a hobbyist then, in a way, your time is even more valuable.
And if you're not sure how to use it, or why you would use it, check out the Accessorizer videos in the lower right of the home page.