I got upgraded from 2.36.108 to 2.40.21 as well. The release notes seem to have the same v8 content, but I don't have access to the car now.
Note: in the Firmware 8.0 centithread thread MP3Mike
posts a screenshot of release notes implying perhaps that USB search has now been included(!): "Search is now simpler to access and more powerful:
you can search TuneIn and
music on your USB."
Can someone verify if that's actually the case for 2.40.21?