"I think users of other sites are certainly used to having one and Facebook is promoting the fact that they're going to enable this," he said.
While people accustomed to MySpace and Twitter might not have spent their Friday nights camped out at their computers, as they see their friends migrating to personalized pages, they'll likely follow suit, he said.
And if you plan to customize your site, give your user name some thought. 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 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.
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.