...or you could call it 14.04 (and Android 2.3, 4.1 etc etc) if you don't like easy to remember words. Let's face it 'Mavericks' and 'Blue' aren't much better.
"Normally" such an app (avrider) would be set up with routing such that the url became /forum/thread/<id> -- and with a simple 6-digit id, that's much more managable to type/communicate manually than an uuid or something.
All that said, I basically agree -- exposing some "magic" constant/serial number to the user usually doesn't do much to help with the ux. It's actually an interesting problem: what would be the better, more "true" web/REST-like url-scheme for a forum? Perhaps forum/topic/sub-topic/thread-topic ? How limiting would that be wrt. reorganizing the forum threads (and not breaking links) -- this is especially an issue if there's a chance of re-using uri's -- it's annoying to have a link to one discussion morph into a link to another one. I don't think there are any solutions that are significantly better than a (symbolic/numerical) thread/topic id...
edit: Actually I see the sense in the email-id-like urls of the d-mars forum (or usenet-like).
Is it just me or is the clock not quite 100%? I see little grey lines/borders appearing around the individual blocks that are rotating. User agent, if it helps: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0
