Taking your portal off-line seems to be gaining interest more and more. I was pleasantly surprised to hear how many people are familiar with WED and Lotus Expeditor and also want to have their portlets run in an off-line environment. We also got many requests for running portlets off-line on devices like WinCE and Palm. I was also impressed with the wider knowledge of the Eclipse platform; especially since most of these folks are web-type and portal developers.
Lastly, the biggest interest was in using Hannover components collaboratively with portlets (portal components). I got the most questions around this capability as many in the audience are current Notes customers.