I just bought a 4gig card off of Ebay. It was one of the cards listed in this thread.

http://cgi.ebay.com/ws/eBayISAPI.dll...9780&rd=1&rd=1

It came with an SD adapter as well as a USB adapter. I got it in the mail today about 4 days after I ordered it. The first thing I did was use the SD and USB adapter to format it on my desktop PC. No problems there. Next I put it in my 6700 to see if it would see the card and it did. I then used Pocket DVD Studio and copied three movies onto the card. They totalled up to about 1.23 gig. I put them into a folder and then copied that folder two more times for a total of 3.88 gig on the card. There was a temp file created when I formatted the card. I renamed each folder and also renamed each movie file in each folder so that none of them had the same name. They all play fine on the 6700 so far. Its not as fast as my old 2 gig card.

Are there any other tests I can do do for anyone before I wipe the card and start using it for everyday data?