MacOSX Leopard has come and now a lot of people are curious about what it is exactly, so if you are also looking for an official MacOSX Leopard icon pack, then you should know that it's very easy to get one. The official icons are not sold, so it's actually free to use them. All you have to do is go to Google and type in 'mac application'mac application icon pack'. If you're searching for an application like 'FaceTime', then Google will show you all the applications available at the moment. The important thing to note here is that Google offers the latest application updates, so this should help you get the latest version that is compatible with your computer.
I recommend using these Google searches as a first step because they can give you a general idea about what's available in the internet, as well as helping you find MacOSX Leopard icon packs. You can use the search engines like Yahoo, Ask.com and MSN to find a specific application you're looking for. However, with most applications, it's best to use their forum to ask questions and get solutions for a specific problem you're having. Usually there will be people there who know about the application and will know the answer to your question.
So basically, if you're looking for an official MacOSX Leopard icon pack, you should go to Google and type in 'Mac OS X Leopard' and see what it gives you. But if you'd rather try something yourself, it's easy to get an application that will help you get a high quality icon for free.