For those of you have had this problem...
My 2007 CX-7 just started a problem yesterday afternoon: it got the kids and me to the park fine, but two hours later when we left, it was making a baseball-card-in-the-spokes kinda sound (but much louder, of course), especially under harder acceleration (e.g., pulling out of the parking lot, accelerating uphill), and had reduced power until, I think, the turbo kicked in around 3000 RPM or so. I've been using the A/C frequently over the past two weeks or so, and used it on the way to the park, but not on the way home. The car sounded okay when I started it this morning, but a spin around the block revealed the same noise & reduced-power problem. (Of course, I'm 2,500 miles over warranty.)
So, is this what happened to y'all, too? Or do I have something else going on?