Quick Look in 10.7 will now render the webpage for a .webloc file. In previous versions, Quick Look would simply present the .webloc file's icon along with the page's title, URL, etc.
I like to drag URLs to my desktop if it's something I'd like to come back to later, but don't necessarily need to bookmark. I noticed that in Lion, .webloc files are fully rendered by Quick Look. To duplicate, drag a URL form your web browser of choice to your desktop (or a Finder window), select it and hit your spacebar. Pretty useful for quickly getting at the saved information.
[crarko adds: A nice addition.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20110726214408302