OK, I see the "edit", click it, and I can move the image around in the widget, but there's no code visible. Let me explain a little more.
The item I opened in dashboard is one small section of a larger web page. The edit function allows me to scroll that entire web page in my widget window, and reveal a different section.
What I want to be able to do is allow the user to change the zip code that's part of the URL that brings up the page. I think I can hack this into existence using Dashcode, if I can find the code for the widget.
Maybe, since it appears that the entire web page is loaded and only the one small section revealed, there is no real widget. I'll bet, as I think about it, that Safari just hands Dashboard a web page (URL) and a clipping window, and Dashboard uses that in a generic widget and keeps a list of Safari URL/clipping windows instead of building a separate widget for each one.
Ben