Ars reports that the program may be extended to an online offering next year. I'd imagine that would be quite popular far beyond the borders of the UW campus. The course itself was developed with a stellar cast of advisors, including developers from NewsGator and OMNI Group, plus experts from Microsoft, Google and Disney Interactive and is "already close to capacity" for this Fall.
While there are myriad books, websites and other resources for learning how to write Cocoa software, this appears to be the first continuing education certification program specifically tailored to writing iPhone apps. Yes, you can write Mac apps too, but I'm guessing the majority of attendees with have mobile dollar signs in their eyes.