Last night I posted the Alpha version of Acceptance Test Engineering guide - How to Decide if Software is Ready for You or Your Customer to the Acceptance Test Engineering CodePlex community site. There are 300+ pages of content. It is still a bit rough, has some gaps in it, and needs some work, but there is a lot of good information too.
I would ask for some help from the public (developers, testers, PMs, and folks who act as customers or sponsor software projects): Read the Alpha (or just part of it) and reply to the Feedback Discussion with anything you think we got wrong, anything we got right, or anything we missed entirely. Thanks.