1) Open the Browser
2) Load any web-page
3) Bring up the browser menu
4) Click Page -> Add to Launcher
Now, when you normally add a website to your launcher the icon will default to the upper left most portion of the page. But you can customize the icon:
5) Click the icon (see below):
6) You can now choose which portion of the website you want for the icon. You can pinch to zoom for a close up. This should be handy for people who don't like ugly icons in their launcher
Note: This trick also works for adding Bookmarks.