"Live! with Kelly" co-host remains a big question mark

(CBS) Kelly Ripa has been flying solo ever since Regis Philbin's departure last month. Even the show's website has been changed to simply, "Live! With Kelly." Despite the influx of guest co-hosts, there's still no word on who will fill the vacant stool.

Over the last few weeks, several people have sat in the co-host chair, including Jerry Seinfeld, Neil Patrick Harris, Taye Diggs, "Dancing With the Stars" pro Derek Hough, Jonah Hill, Jerry O'Connell and Josh Groban.

This week, singers Michael Buble and Kevin Jonas, as well as broadcaster Bryant Gumble, will all take a stab at co-hosting with Ripa.

But who will be the permanent replacement?

It's really anyone's guess, as no timeline has been announced to replace Philbin, who retired from the show after 28 years.

Back in September, "Live!" executive producer Michael Gelman told TV Guide, "We'll do what I call 'dating.' We'll have different guys come and we'll try them out, check their chemistry. We'll see how they work with the format and how the audience reacts. And it's easier to get audience feedback in this day and age with social media."

Names as diverse as Nick Lachey, Bravo's Andy Cohen, Ryan Seacrest, Mario Lopez, Dana Carvey, Tony Danza and even Ripa's husband Mark Consuelos have been floated. There's even a Facebook page pushing Danza as Philbin's replacement.

Maybe producers will go with a someone who's not a household name. When Ripa was chosen to replace Kathie Lee Gifford in 2000, the "All My Children" actress was relatively unknown outside the soap opera circle.

Or maybe Ripa won't get a permanent co-host after all, and we'll see a continuous rotation of hosts.

Tell us: Who do you think should sign on as a permanent host?