As a heavy Omnigraffle user who is trying to migrate to Google docs I am very excited. Unfortunately Google hasn't made it easy to embed these drawing in documents. I'd love to see a "live" embed.
I've been using this for about two or three days and apart from a few issues (unable to create more pages, no revisions, import your own symbols) its a fantastic v1 product and the live aspect is better than most I've tried.