Have to say, this is all sounding very interesting - I'll be watching Amazon with interest .
Have to say, this whole level/adavancement approach reminds me a little of Rolemaster/MERP (which was nowhere near as scary as most people think if you had a decent calculator ). Before people squeal in horror, the biggest strength of RM was that when you went up a 'level' you spent your points where you wanted, including getting more Hit Points. Even using classes, it allowed a lot of variation.
DecTrek seems to have developed this idea further - I like the sound of it. And it's very different from D20, whatever you may think about levels...