Just in case anyone's not already spotted it, Owen Stephens is doing a fantastic job of blogging ALA 2008.
I've been pondering trying to organise a UK library unconference for a while now, but haven't progressed it any further than the "pipe dream" stage. I wonder if I could persuade Kathryn Greenhill to immigrate to the UK? 
Anyway, if a UK library unconference/barcamp/hackfest style event is of interest to you, make sure you leave a comment on Owen's "Mashed Libraries? Would you be interested?" thread.