But if you do plan to join the rush, in all your excitement, don't be too hasty. Designer DiPersia's blog post cautions users to think carefully about the names they choose because once it has been selected, it can't be changed or transferred.
Even if in your fatigue you misspell the username of your choice, Facebook won't change it. Also, once an account is removed from the site, the user name will not be made available to others for security reasons, the company's Web site says.
To prevent people from squatting on names, the company says you might not be able to sign up for a personalized page if you signed up for a Facebook page after May 31 or a user profile after 3 p.m. ET Tuesday.
Although users can claim personalized Facebook pages without any charge, Ostrow of Mashable speculates that the company may be able to profit off vanity URLs in the future.
Noting that the company has said that generic words like "pizza" and "flowers" will not be up for grabs Saturday, Ostrow said Facebook could potentially sell those URLs for a decent price. "Sports," for example, could be sold to ESPN, he said.
"It's certainly something Facebook is keeping open," he said.