I'd been using the URL shortener at metamark.net (it shortens things to http://xrl.us/...) for a few weeks. One thing I really liked about it was that it had a fairly nice api, which made it very easy to fit into my mud client (tinyfugue). Sometime on Monday, the service just went poof. I haven't been able to find any news about it either. Anyone else have any idea what happened with it?