If you haven’t already forgotten, the WGA strike continues without a resolution. So count this as a reminder that the late-night chat shows are all on the air.

David Letterman and Craig Ferguson remain the only WGA-approved shows. Comedians on the lineup for Letterman this week? Bill Cosby on Tuesday, Artie Lange on Friday. On Ferguson’s show? Denis Leary on Monday, Ryan Sickler on Wednesday, Sebastian Maniscalco on Thursday, Al Madrigal on Friday.

Conan clearly needed last week off (they replayed his visit to Chicago) as he’s really tried harder than the others to do a show without writers.

Leno? Ack. Jon Stewart seems to have all of his correspondents back on the air, sometimes with pre-taped segments that may or may not have been in the can pre-strike, but also in the studio and not always improvising. Er. Um. Stephen Colbert has been doubling up on guests to fill time.

The fact that you can watch full episodes of Leno, Conan, "A" Daily Show with Jon Stewart and The Colbert Report online only heighten the tension, because online plays and revenues are part of the heart of the matter in the WGA writers’ negotiations with the producers at the AMPTP.