You can get Agfa Scala at B&H. If you try it, make sure to buy the mailers at the same time - not just any lab can process it. I took a Scala class, and I've really enjoyed using it. It took me a few rolls to learn to visualize in B&W - using a red filter helps with that.
How do you find the B&W slide film? I've wondered about trying it out... although I really think I see the world in vibrant colour, not B&W. (most of my B&W shots are horrible!) I really like the way the road/path leads my eye into the photo here... the detail is great!