I have to admit to an embarrassing situation Wednesday afternoon. While writing the iPhone OS 3.1 overview post, I got to the section about "Genius Mixes" and was totally boggled. I couldn't see any way to create them on the iPhone itself, and there was nothing I could see in iTunes 9 that would do the job.
Fortunately, there are some fairly bright people here at TUAW, and after a couple of quick exchanges in iChat, I had Genius Mixes working. If you don't have access to a Mac and iPhone brain trust like I do, you might also have problems setting up Genius Mixes, so I'm here to give you the rundown on how to do this. Read on for the rest of the details.