Hey all, perhaps I can help a bit on this particular topic. I recently purchased a QX56 and am LOVING it so far. I own a software dev company and have always been really into technology, whether it be home theater, automotive, computer related or whatever.
Yes, the CF technology is a bit outdated, but these vehicles are still ahead of the curve compared to other cars/trucks. Acura is usually pretty innovative, but even they don't have a memory card slot in their line-up yet.
Now, here's my fix for the problem. You can simply purchase a CF to SD adapter that will work just fine in the slot. You're still limited to the 2GB capacity, but SD cards are smaller, and much cheaper than CF media. The SD card fits completely into the CF adapter and it fits nicely. The best deals I've found on the adapters is on eBay. You can usually pick one up for about $25 and free shipping. The ones I've purchased are actually shipped from Hong Kong, but they guy is consistent. I also recommend that you get an adapter that specifies it supports SDHC (the newer SD technology) so you can use it with larger capacity SD cards in other devices if you wish.
Here's a link for you:http://cgi.ebay.com/MMC-SDHC-S...l1318
You can also play MP3 files from a CD, but they won't burn to the internal 9.3 GB hard drive.
There are a few shortcomings with the media functionality of the Armada/QX, but as far as I'm concerned it is still the best out there and has so far made me a very happy camper!