I'd definitely go :)
I've known purplerabbits for over two decades; we lived together for one of those decades and I've organised events with her and been to other events she's organised, and I can testify that any event that she runs will be very well run indeed. I hope this happens so that I get to go to it!
On the principle of organising events that I want to attend myself, I would very much like to organise a rationality conference/convention in the UK. I organise events for a living; in addition, in my free time I've organised five ~200 person weekend conventions and several other events.
At the moment I am thinking of a one day event on a weekend or a Friday in August, at Stamford Bridge or somewhere else easy to get to around London. There would probably also be a pre-conference dinner, or private bar night with music.
Costs would be in the region of £50-£100 a head including lunch.
Can I get a show of hands to see if the idea is viable?