That's unfortunate. Luckily, I managed to get tickets; I'm going with two friends who watch it and two who don't. Steven Moffat has said that he's written it to be accessible (and, indeed, a good jumping in point) for new watchers, so hopefully it'll hook them.None near my town. Oh well, will be on the sofa on the 23rd November.
"Anyone attending one of the theatrical events will get a bit of an extra treat in the form of bonus footage. According to BBC America, “The theatrical events will include specially shot introductions and The Day of The Doctor: Behind The Lens, a 10 minute behind-the-scene featurette directly following the special. The short features Matt Smith, David Tennant and Jenna Coleman with Billie Piper and John Hurt, as well as lead writer and executive producer Steven Moffat, discussing their 50th Anniversary experiences.”"
Presumably it'll be the same in the UK and elsewhere, given that the BBFC has put one version of the 'Video' version of The Day of the Doctor at 76m 44s, the other at 80m 0s (not sure what's going on there), and the 'Film' version at 85m 24s.
I've been watching a few more Classic serials in preparation for the 50th. I've watched The Terror of the Zygons, The Tenth Planet, The Tomb of the Cybermen, and The Attack of the Cybermen. I also intend to watch An Unearthly Child when it airs on BBC4.
EDIT: More news.
Some 'additional material' for The Day of the Doctor has been approved by the BBFC. It's 3m 57s long and it's called 'The Last Day'. I wonder if this is the specially filmed trailer they talked about a few weeks ago.