Did you guys considering selling it on other platforms besides eBay? (I don't know of any; I'm asking out of curiosity of whether there's any competitors for hosting an auction like this)
P.S. I looked at your site -- I took 252r this semester and loved it, though the topic was different this year.
The screenshots near the top definitely look like part of the web page -- I tried clicking them at first. A border of some sort might help distinguish it (I didn't see the three dots at the bottom at first, and most laptop screens probably won't be able to see it either).
Evernote has a pretty casual user friendly design, too. There are a lot of other options on the mobile apps, but I ignore them and can testify that Evernote Mobile still works fine for me. The two just happen to serve different purposes -- this application is geared towards a more specific one.
I'm reading it now, too. There are a lot of examples (it comes with a VM), but the book is still more conceptual than hands-on. The exploit-exercises site posted above looks pretty good.
This is a good point. I went to a Dropbox talk, and one of the employees mentioned, in a similar vein, that a lot of users first use the app on a mobile device and never realize that there's also a desktop client.