“If there isn't a quick resolution, then the season ends in February. It is our wish that this strike will be resolved quickly so that we can get back to doing what we love -- writing.” - Gough on the fate of this season's Smallville, BuddyTv, 11/17/07 [link] 
Considering the writer's strike... "Smallville creators Alfred Gough and Miles Millar have stated their support for the writers, but that fifteen scripts are prepared for the show and are planning to be produced. The last script is said to end on a cliffhanger and no plans for changing that have been announced." - Comic Book Bin, 11/8/07 [link] 
"Marc McClure, who played Jimmy Olsen in the Christopher Reeve Superman movies, has just finished filming scenes for an up-coming episode of Smallville. Marc will be playing a Kryptonian known as Dax-Ur." - Superman Homepage, 10/30/07 [link]
"Oliver Queen/Green Arrow (Justin Hartley) is returning to The CW series in January, and he’s bringing Black Canary with him. The episode is titled, appropriately enough, “Siren.” No word yet on who’s playing the character." - Newsarama, 10/25/07 [link]
"We last saw (James) Marsters on SMALLVILLE in the fifth season finale, playing Dr. Milton Fine, the man who would be Brainiac. Now he's returning -- despite the way we last saw him -- in four episodes of the upcoming season. There're no other details than that, however -- guess the way he's coming back will be the real surprise. I mean, honestly, when did you ever know a villain on a genre series to die and stay dead?" - iF Magazine, 10/15/07 [link]
"It had been announced previously that this coming season would be the last for Smallville, and Michael Rosenbaum had confirmed it would be his last." - ComicMix.com, 5/15/2007 [link]