Good review. I've had the same experience with the igep v2. I love it and hate it. Love it because it has huge potential. Hate it because it is damned difficult to figure out how to install stuff on it and, as you noted, installation instructions are often incomplete, leaving you dead in the water if you aren't Linux geek. In fact, the igep is the reason my custom title reads "Linux loser". I just can't get it to do basic stuff like boot from an external SD card.
What we need to get serious about, and what I was hoping I would be able to provide the community, is a distro of Ubuntu that has the appropriate drivers and a complete set of instructions or video that show people how to get the thing out of the box and up and running.
In addition, Meego will/does run on the igep and it should be a good platform for that OS when/if it becomes more useful. So, if you want to work the cutting edge of the car pc scene, get an igep and start tinkering. We sure could use some help.