I mentioned this yesterday, but it was in the post with yesterday's "Smalltalk Daily" - the videos should now work on iPhones and iPods. There had been a format problem, but one of the people following the daily screencast notified me, and verified that the new format works on the iPhone. So have at it, and let me know if there are issues down the road.
You can subscribe in iTunes with this link.
Oh, and do check the archive pages. There are over 400 screencasts categorized there, on a variety of topics surrounding Cincom Smalltalk.