If this is something you might be interested in, drop me a line - peter at the pbell.com domain. If you know anyone who might be interested, please pass the word along!
Now as a (mainly) back end shop, the issue we run into is that we often get comps from designers that look good but that have no information architecture (IA) thinking at all. Also, as we're often brought in after the comps have been agreed, we seldom have the ability to change the approved comps. It is bad enough that the sites often don't get any IA loving, but sometimes we even get sites where the functionality implied by the comps is different from the functionality we quoted for, leading to the designer having to change the approved comps or us having to re-price the job to add the cost of implementing the additional functionality.
For larger projects we sometimes used to develop wireframes, but usually the cost of wireframing the IA was too high (bear in mind these are usually sub $25k apps to the end user - often sub $15k - including project management, look and feel plus the substantial back end functionality we provide). Also, I never really found a tool that I was comfortable with for quickly wireframing sites. I'm not a designer and I found most of the designery tools to be a little too slow to use and to have a little more learning curve that I was willing to put up with . . .
