IPhone Doodles

I found my Wacom Bamboo stylus the other day while cleaning, so I opened up Autodesk Sketchbook on the new IPhone, for some doodlin'. I find the most time consuming thing is switching brushes, colours, layers, etc...I think I'd like to try the new Wacom stylus, with all it's customizable buttons, and pressure sensitivity. If anyone has tried this new magical device, please let me know how it worked!