I read the manual and love your approach. However, I'm already building 2 systems on top of a self-written ORM (probably very much inferior to yours) which was inspired in part by IgnitedRecord.
I'll probably switch to RapidDataMapper on my next project though as especially like the seperation of object & logic. I'll let you know my experiences when I've done some real stuff with it, but that won't be for another 2 months.
I might give it an early try if I get round to rewriting my own business's administration software - which I wrote in a hurry about a year ago when I needed it and still has a lot of db usage in the controllers. I'll let you know any experiences I have.
