I am tempted to attend, if for no other reason than that I am sitting on a few nearly-complete DW bugs, and this might be a way to make myself actually finish them. I think I would need to make a deal with myself to not take on anything new!
There are, of course, other reasons for attending anyway ;-)

So, um, not sure yet (I don't want to be too sure of much until post-Viva), but will put it tentatively in my diary.