I'm on lecture 11 of the Standard CS193P (Fall 2010) series and loving it. I watched lectures 1-8 in a row over a few days while testing out the examples and changing a few small things to get the hang of Objective-C. Then I took a week off to play around with the UI viewcontrollers and built a skeleton of my app: http://www.chir.ag/ktype/research:articles:progress_20101116

Now I'm back to watching the video lectures and learning how to use Core Data, Persistence etc. so I can actually make my app functional. In my particular case, I will end up using almost everything (OpenGL ES2, CoreAudio, Core Data, Gestures, GameKit) so I'm really glad this course exists. I tried learning Core Data on my own through online tutorials and it made no sense. I'm barely into the lecture but it already makes so much sense. The lecturer is very straight-forward, barely makes any mistakes (I love spotting those), and does not bore me. He also goes over many small gotchas, minor differences (nil vs. null), and best-practices.

I plan on catching up to the latest lectures over the next few days and then jumping right into coding up my app.

Evan Doll is the bomb! This is how I learned too.