During our YC demo, we just used VMWare, dumped our server into it, changed the host file to point draftmix.com to the proper IP, and boom. So while investors were seeing our actual code in action (not some prerecorded, ideal situation version) it wasn't dependent on the internet.<p>Also amazing for us was the ability to snapshot. We started up a league, snapshotted, then ran from there, so that when the demo started, we could show a league in action.