Speaking of presentation (look at that smooth segue), I was doing some work on the interface today for a C# program for work and stumbled upon Yahoo!’s Design Pattern Library. It’s a catalog of common interfaces, the problems they attempt to solve, and a discussion on the pros and cons. It’s certainly not the only pattern library available, but it has a fairly extensive collection with good examples. Many, if not most, of the designs should be familiar to you, as they grace a number of websites.