A Google spokesman said the invitation process will be opened and closed periodically as Google works on getting the network ready for its big public release. Google hasn't said when Google+ will be officially released.

EBay auction prices vary widely for Google+ invites. But as of today, they are worthless.

Sharon Gaudin covers the Internet and Web 2.0, emerging technologies, and desktop and laptop chips for Computerworld. Follow Sharon on Twitter at or subscribe to . Her e-mail address is .

in Computerworld's Web 2.0 and Web Apps Topic Center.