It’s also worth mentioning that the fb.com domain will only be for internal use by employees, such as email addresses. Those of us who aren’t paid by Zuckerberg will have to make do with the previous @facebook.com email addresses that were promised.
Some folks treat domain names as a good business, similar to how you’d invest in property, and selling off a domain for $8.5 million is probably a dream to most folks. Would you have sold off the fb.com domain to Mark Zuckerberg if you owned it, or would you keep it for yourself and cackle in glee knowing what you own?