Picked up the car this afternoon. According to the receipt, it's bulletin 21-18. They installed 8 SEMS screws and 5 plastic washers ("Add washers and updted bolts to subframe"). In a shocking development, the problem still exists. I was able to recreate it exiting the highway about 5 minutes after picking it up. Anytime there is a load on the front end and the wheel is turned, you hear it. This can be under braking or with a lot of people/stuff in the car. I am not surprised.
They also told me the power seats are fine (I've had the software update), despite the fact that they still randomly move and have a mind of their own.
They were nice enough to give me an '08 XC70 loaner, though I must say, I was really less than impressed with the 3.2. It's only rated at 15/22 mpg and the power is really lacking when compared to nearly all other European and Japanese engines. It's not exactly smooth either.
Oh well, I decided a while ago that this was my first and last Volvo. Too bad, great design on the XC90, but poor execution has me walking to other brands.