Judging by the traffic to the iPhone OpenAL IMA4/ADPCM article, it seems like there’s quite a bit of interest in iPhone programming out there :)
So, for those of you whose interests lie that way, I thought I’d put up a quick note about Wolfgang Engel’s blog, Diary of a Graphics Programmer. When he’s not at work at Rockstar, Wolfgang’s the force behind the iPhone Oolong Engine, and he also wrote the book(s) on DirectX shaders. He’s currently writing up a series of iPhone programming tips, from setting up XCode to the murky depths of pixel shading, so check it out.