by Vera H-C Chan If there's anything we've learned from Hollywood, the town likes to bank on familiar faces, and it likes to sell ads. But crossing over from commercial break into a show doesn't happen all that often: For every Rudolph the Rednosed Reindeer, there's the Geico Cavemen dying a quick primetime death . Ah, but all it takes is one deal to give hope to a pitchman, like the Old Spice guy's NBC talent contract . Plus, these days,