Just taken receipt this morning of my second Roku Soundbridge. I've been so impressed with the one that I bought a while back that I thought it was time to invest in another. Turns out that it's an updated model with built-in wi-fi (rather than it being an add on with a compact flash adapter) and it has its connections on the back of the unit as opposed to having them under fiddly end caps. Both are definite improvements over the original design (which was almost perfect to start with).
The other nice thing is that Roku are very good at releasing firmware updates to give the Soundbridge new features, which is a great idea. Well designed, genuinely useful, and works seamlessly. All in all, an almost perfect gadget!