what is the latest version for an 08? i see a bunch on ebay and i read that some guys even make their own dvd map. is it as simple as popping out the old and popping in the new? anyone has a good source to get one?

Thanks,
Sid

I too would like to know this info. I will be watching your thread. I have an 04.

This link has most of your answers;

https://secure.drivers.lexus.com/lex...igationmaps.do

Each generation has a 2011 version and part number list.