I have the 6600 and love it! For all of you that have it or the 6500, there is a Yahoo group just for owners of these machines.
http://groups.yahoo.com/group/Janome6500/
You have to join the group. I set my preferences to web-based only so that I don't get the daily emails or whatever. There is a lot of information, suggestions and help in this group. I know I have just barely touched the possibilities on my machine, but I keep learning!