How do you package your application? Have a look at these, they have done a really good job. They should be able to give you some inspiration of designing your website or web application in Mac style as well.
1. Disco – Mac Disc Burning
2. Versions – Mac Subversion Client
3. Checkout – Point of Sale for Mac
4. Pixelmator – Image Editing for the Rest of Us
5. KiINVOICE – Invoicing Made Simple
6. Delicious Library – Catelog, Browse and Share Your Stuff
7. Warehouse – Subversion Browser
8. Coda – One-Window Web Development for Mac
9. CSSEdit – Web 2.0 in Style
10. Cha-Ching – Fun and Easy to Use Money Manager
Do you have your favourite ones in your mind? Feel free to suggest them, I will add it to the list. Please bookmark this, this post is regularly updated.