Not sure if you lot over there get
Damages, the crime drama starring Glenn Close.
Anyway, we're half-way through the second season over here, and Clarke Peters (Lester Freamon) and John Doman (Bill Rawls) both play fairly major characters. And David Costabile (Thomas Klebanow, Managing Editor of The Sun in Season 5) has been in both seasons of
Damages.
Apparently Idris Elba (Stringer Bell) is going to be making a guest appearance on the American version of
The Office later this season. According to news sources, they've signed him for 6 episodes.
Lance Reddick (Cedric Daniels), as well as having a MySpace page and a budding musical career

D), is currently starring on a sort of
X Files-ish show called
Fringe, about FBI agents who investigate unexplained phenomena. I haven't seen an episode, but the ads make it look truly dire.
I was also quite surprised to see Domenick Lombardozzi (Herc) show up in an episode of
Entourage this season. Paul Ben-Victor (Spiros Vondopoulos) also was in an episode this season, as a movie exec.
Just before i left Baltimore last summer, Maria Broom (Marla Daniels) was doing a local show highlighting aspects of Baltimore life. It looked pretty awful, and i felt bad for her.