I'd like to check the iDrive/Progman version, as well, but haven't found a way. There is a way to check the hidden menus but I can't find any indication of the Progman installed.
I just had an O2 sensor installed and was told it involved updating the software but I can't see any difference, and my iPod scrolling is still slow (I assume I have ver. 27, as my car was built this summer at the end of the 2007 cycle and picked up in Munich at the end of September).
If anyone knows how to check the Progman, please pass along!
2007 335ci 6MT Space Gray/Saddle