So it turns out the new Cannondale frame doesn't come with a seat post, which I wasn't anticipating. The old seat post is a different size and so I can't just use that one. Thankfully this isn't much of a setback because the pedals are still on order so I'm not really missing out on any riding while I order up a new one. Also because I already have a working road bike.
Only hitch now will be if the bits don't come before I move. That would be awkward. Still got a few weeks before that happens though, so I should be good.