The first week was a focused on setting up your environment for development, which I didn't need, but it was still interesting. A web server that supports PHP is required, as well as a mobile phone, or phone emulator. I have an Android phone, but I installed the emulator anyway to QA with differing versions and screen sized. The iPhone emulator is a different matter.
A brief aside here. Apple being, well, Apple - they don't offer an emulator for the PC. I think this is an interesting decision, considering the massive amount of developers who work on Linux and Windows machines, and aren't willing to add an additional physical device to their offices and workflows. I don't really get it. Are they trying to sell more Macs to developers? Doesn't this create a barrier between Apple and potential customers?
Back to the course. Week two was more interesting. We covered the basics of HTML5 - The Doctype, some new tags, etc. Then put together a quick UI for a Twitter app. I picked up O'Reilly's HTML5:Up and Running, so this was nothing new to me, but putting it together in an actual interface with some CSS3 was a good time.
Next week we'll add the AJAX calls and cover some security issue. If you have the time, I recommend the course. Oh, and did I mention its free?