I couldn't spot a dedicated 'introduce yourself' area, so I'm posting in here. I've just joined xF after lurking for the last few years. I've been developing vBulletin-based forums for last 12 years, the biggest one is a UK-based forum with 160k users and 6.8m posts. I also have some smaller sites, one of which runs on IPB.
There aren't that many large UK-based forums and therefore it's a relatively small world (I know, in a virtual sense, Stu from AVF as well as a couple of others). I also had the opportunity, many moons ago, to chat with Kier and some of the old vB team when they had a booth at a show in Earls Court.
I can't yet commit to swapping my largest forum to xF, but at the same time I know that I won't be going to vB 5.x. This leaves me seeking a new 'home' for my various forums and hopefully xF will turn out to be the choice.
In the meantime I thought I should at least join in with the discussions and share anything I can from my decade or so of running large forums