A novel way to address your envelope
mapenvelope.com
mapenvelope.com
And a partial howto from one of Google's Appengine devs, Nick Johnson:
http://mapvelopes.appspot.com/
http://blog.notdot.net/2010/04/Generating-PDFs-on-App-Engine...
I think this would be fun, but anyone have any experience making their own envelopes? Wonder if they hold up well...
Edit for update: I received this answer to my question:
"The policy is that we don't do anything with it whatsoever.
-- Stephen Hallgren"
That might be a good thing to say explicitly on the site, with the usual "privacy" link text.
The privacy policy is a promise. Broken promises have repercussions in proportion to how well known it is that you break your promises. For Facebook, that might be important. For weekendproject.com, I can't imagine why you're fixated on it.
Just using the satellite images alone wouldn't be allowed, because they're not obviously from Google. Using the satellite images with the Google streets displayed on top probably would be okay because it's obvious where you got it from (though you have to include the attribution too).
This is mostly just the satellite view but they also use a honking big Google speech bubble and little red place marker, which possibly brands it enough to pass muster.
http://www.google.com/permissions/geoguidelines.html (see print section)
Your right this wouldn't be an issue with OSM as they're much more open, but then they're mostly maps not aerial photos.
There was http://www.openaerialmap.org but I don't think it's live anymore.