Yesterday was my first day at XTech 2006 in Amsterdam - the pre-conference day, with tutorials and a special "Ajax Day" track. I was unable to attend all the sessions and one presenter did not show up, but I did attend the talks on Dojo, OpenLaszlo, Flex, and Backbase.
Most interesting was the presentation of the Yahoo! User Interface library (of which we currently use the slider component to implement
xforms:range). It appears that there is much more from it we could use in Orbeon PresentationServer, from basic facilities to event handling (even as the page loads), to animations to other widgets like the tree widget, and drag & drop.
The day ended with a series of 8 or 9 lightning Ajax demos, where we showed the OPS Ajax-based XForms engine - it was quite a challenge to do this in 5 minutes, but I got my last screen showing up as the clock marked 0:00!