ok, so well done all you lot who got thru and may have tickets.
I didn't get thru, so I can only go on my experience on previous years - things may have changed. In the past you got a ticket but had no garentee of entry - has that changed? I have queued outside the beeb from about 2pm onwards to ensure I was at the front of the queue and got in. It is worth it as it is awesome seeing it live. But unless they have some new system of garenteed entry if you spent all day phoning up, don't waste the oppourtunity - get there early to queue.
Take a folding chair, and if its winter, warm clothes. They have a cloak room and you can get changed once inside.
Good luck and keep us posted!