Well, the Accelero is installed and everything seems to be running fine. I wish I had a way to check the GPU temp, but the only thing I can find is a reading for the expansion slots (currently 34 degress C according to iStat, been running all day).
The install was pretty smooth, overall. I had to remove the stock heatsink from the voltage regulator because it was too tall. The heatsinks that come with the Accelero are lower in profile and fit under the Accelero unit. So, if anyone else is planning on doing this swap, make sure you have some needle nosed pliers handy (you'll see why when you see how the heatsink is attached to the card).
So far, this is wonderful! No noise, and an updated GPU!