There's a lot of other entries in that table...
Go use one of them if you're bothered about lock-in, or libraries, or anything else. Or get your own server, and do the whole thing yourself. Then you can even control the colour of the bloody power switch, if you so desire.
Or you could see AppEngine for what it is. A free server to prototype your apps on, or host minor bits and bob. For oiks like me with no access to public servers, it's a godsend. If you can afford your own servers, or are hitting against problems with what Google provide, maybe that's a sign that you need to move along and put your big boy trousers on.
And as for libraries and rewrites wrt GFS et al... make a modular system, and plug your components as you need to. Not rocket science, is it?
Biting the hand that feeds IT
