All you need to do is create a cname record for 'app' to point to ghs.google.com (did a dns lookup - seems you have already done that). Then, log into your Google Apps domain CPanel (www.google.com/a/[your-domain]) and click Add More Services, then enter the App ID for your App Engine in the "Enter App ID" field. When you have done that, click Add new URL, and enter the new url.
Note that this will not work if you have configured all your app engine handlers to work over SSL only -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/lo-K38isCs8J. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
