I'm with you on this. I'm not in the exact boat as Maynard but I definitely agree with his frustrations.
My Main pointt are not that you actually get less tan what is "advertised", it;s the percentage. It's one thing if you're losing 20GB on a 320GB drive, but when you lose 7BG on a 20GB that's just craziness. And can someone give me the explanation of why we get fucked with the memory card space too?
My other point is that MS's proprietary peripherals are egregiously overpriced. It's one thing to not give us options, like the PS3 does with it's hard drives, headsets, etc, but to completely fuck us in the ass with the prices is a joke.