Google Public DNS
Here’s a very cool new service from Google, that can significantly speed up web browsing: Google Public DNS.
I followed the instructions on this page for setting up Google Public DNS on my Mac; it worked without a hitch, and it definitely does improve the speed of page loads across the board. Give it a try. (But be sure to save your original DNS settings first, just in case.)
UPDATE at 12/3/09 3:49:56 pm:
And if you’re as geeky as I am, check out the security benefits of using Google Public DNS.