"North by Northwest," for one, was recently digitally-restored (correcting faded colors, etc.) and had a limited run in a few theaters in "major American cities." I would imagine that several other Hitchcock classics might be in line for similar treatment. (I'm sure that at least a few others have already been restored).

The Turner Classic Movies cable network as been at the forefront of announcing, promoting, and screening this kind of preservation project. They also air plenty of old black-and-white films (including early Hitchcock), which are less likely to need restoration. Browse TCM.COM for more info.

One cable network is currently showing the old Alfred Hitchcock Hour TV series from the 1950s (or maybe it's the very similar Alfred Hitchcock Presents from the early 60s). These were weekly one-hour dramas. On contemporary cable television, without commercials, they run about 40-some-odd minutes. Even without the ads, you still get to see Hitch's very droll introductions to each commercial break, as well as the intros and "out-tros" that begin and end each installment.