Ideas for an icon

I will be giving a couple of presentations (one at UPenn next week, another in Sweden in a month) and InstaDMG will be part of those presentations. For them I am in the middle of creating a couple of charts to show the processes used in imaging computers. I am of course including InstaDMG on the chart, but so far it is the only one that does not have a icon. I whipped up an icon this weekend, but inexplicably the background of it is a CD (I really don't know what I was thinking at the time): [url]http://instadmg-dev.googlegroups.com/attach/053c1778ecfb548e/InstaDMG+icon.png?view=1&part=2[/url] I don't have any better ideas at this point. So if I could ask people to do some brainstorming here, I will see what comes of it, and then see if I can't whip up something based on those ideas. I will say in advance that if I don't see how I am going to create something (or if I am personally not into the idea) then I am not going to do the artwork. Alternately, if there is someone who would like to put together something and submit it for consideration, that would be welcome as well.