RE: Auto Dimming rearview
I just purchased a 2007 SE and wanted this auto-dim +Homelink mirror too. I learned of a guy named Dave (from over at TN) and he has several for sale on ebay. I grabbed a Toyota OEM one for less than $200, including wiring and instructions and I'm installing it tonight. He has others that some folks use in Toyotas very nicely.
Since I don't know if Dave wants his email address given out, his ebay username is "sales-at-dnd-enterprises" and you can likely reach him via a PM over at ebay. I can tell you he was very friendly and answered many questions for me.