For those keeping track, I had previously rated my chances at 70% to attend due to a large project that we have on at work.
The bad news is that there is no way we will be meeting my 31st May deadline; the good news is that we are so far off that I have not been asked to work this weekend in the summary meeting I just attended.
As such, I am upgrading my chances to 90% - and I now expect to be there. Wahay! (Hopefully when the news sinks with HQ they won't turn the screw and ask for some Saturday hours.)
See here for main thread and list of likely attendees.