This indeed will be the easiest way to become a part of Guinness Word Record holder party. Just download Firefox3 on 17th June 2008, and you will be counted as part of another history that is going to be created - Most download on a single day!
I hope Firefox had already strengthened their servers to meet the download demand. When Fedora9 was available to download, its download servers were crippled during initial hours.
Read the full story here and here