After several other Debian developers convinced me that a ShortURL service, which is under control of a Debian Developer would be useful for them, I've spent some time to write the necessary code for it. And if it will be used regulary, I'll ask DSA if they want to host it on a proper machine.
As this should not become just another random, spammer-attracting ShortURL service, I will not provide a web based form to add new URLs. Instead new URLs have to be added via a simple JSON-RPC based interface. Other ways to add new URLs will be added on request (or by sending patches ;)), at least an email-gateway similar to db.debian.org is planned.
The small piece of documentation which exists so far is available at wiki.debian.org/deb.li And if you want to give it a try now, log into alioth.debian.org and have a look into
/var/lib/gforge/chroot/home/users/bzed/godebian-client- the usage is documented in the README file and should be pretty straight forward.
I hope it will be useful - comments, bugreports and patches are welcome!