Hi! Thanks for the feedback. We're sure planning to make the conversion as easy as possible, and Yammer import is on top of our list. We will announce new features in our blog and on Twitter, stay tuned. :)
I'm also super impressed. You could have gone in any number of crazy directions but you kept it simple (dashboard, incoming, searches). I love it. It's like Campfire on steroids.
Personal feature request: preview youtube URLs, images, and tweets pasted into the chat area. Less important: let people select a range of chat messages and tag en-masse so they show up together in a search.
