Recommended training/conferences for UX designer? [on hold]

We would like to invest in a couple of our team members to give them training in UX and GUI design.

I realize UX is a fresh and rapidly changing field, which is why I'm hoping to get some advice from people who are immersed in it - hence the post here. Can anyone please recommend some leading-edge resources for training - courses, UX design conferences, etc

--- Update: I wanted to clarify something after looking at some of the training/conferences recommended in the replies below - our company is building a SAS rich analytic application - some of the feedback has been for more general website and information architecture usability training, which I believe might not be the correct focus.

--- Update 2: As far as conferences go, a few seem to stand out: 1. UX London 2. UI16 3. NN/g Usability Week

UX London might be hard to justify with the extra flight costs from Vancouver, Canada; would you recommend anyone of those over the other for best training and return on investment?