My SQLAlchemy tutorial went pretty well for the most part. It was a fast pace but most people kept up pretty well. If I did it again I would add more of an intro to ORM in general for people who had never used one, but over half the attendees had used SO or django's or tried SA already. I would also paste more code from my slides into the samples download to save people typing during the exercises (I had some, but I would do more next time).
I think most people liked it; the main exception was one fellow who was in way way over his head and visibly pissed about it. (I used a list comprehension at one point and he had no idea what it was.)
The slides are here. (The .py files referred to in the slides have also been moved to the jellis/ subdirectory.)