It's important to note that this is a "community technology preview", so while we've put a lot of work into this, you're right, it's nowhere near complete. The underlying technology here is libgit2, which currently doesn't support ssh, although it's something that is being worked on. (We'll improve the error message, of course, for the future. We appreciate the feedback.)
I didn't really intend to sound like I was making damning criticism. After setup the process seems fine, and solving those issues only took ten minutes (but ideally they wouldn't occur in the first place).
It wasn't taken as such - and we appreciate the criticism, as we've got a fair ways yet to go. I was just wanting to set expectations appropriately since there's been a lot of excitement around here today and even we have forgotten that this is oh so very rough around the edges.
