> you're going to have to wait days/weeks as your copyright assignment papers make their way over snail-mail.

Depends on the country. I signed mine with my GPG key in the United States and simply e-mailed it:

https://www.fsf.org/blogs/licensing/fsf-to-begin-accepting-g...

There's other countries, like Italy:

https://www.fsf.org/blogs/licensing/fsf-to-begin-accepting-g...