Trouble is, having a ton of documentation is not really useful if there's not enough introductory stuff. POE suffers from this. The way people use documentation, at least when starting out, is they want to ask "I have problem X, how do I solve it". The POE docs don't help here, they're just a reference - at least that was the case last time I looked. But a reference is only useful once you know what you're doing.
Last time I whined about this, Rocco said that he knew it was a problem and he'd be happy to accept any documentation I could write. Unfortunately there's a bootstrapping problem there - without having sufficient documentation I couldn't learn the product in any reasonable time scale and so couldn't write the documentation.
exim suffers from the same problem. I learnt exim not from the docs but by taking someone elses config file and hacking it until it Did The Right Thing. I tried to learn POE the same way - taking the test suite and trying to turn it into my application, but POE's just a wee bit too complicated for me to learn it that way ;-)