We use Mach-ii (almost) exclusively as our app development framework of choice here. If you're thinking of learning Mach. you might want to tune in to the upcoming series on cfsilence.com. I don't even know who this is. but in any case it should be a very educational read - he's even looking at trying out a code generator to speed up the process somewhat.

Also a good pointer for anyone learning OOP techniques in a ColdFusion context - this post is a great overview of some of the more common terms used in OOP texts. Should save a lot of time when spinning up!