Experimental branches

[Cary Coutant]

> Let's go for "user/", if people are OK with that.
>
> I'd rather not have multiple namespaces in this case, since it doesn't
> really make much of a difference to us whether it's personal or
> company-sponsored.

Sounds good to me.

So it'll be "user/<username>/<topic>", right? (As opposed to
"user/<username>-<topic>" or "user/<username>_<topic>".) And no need
to put "-branch" at the end of the branch name?

-cary