I'm very excited about Boxee and have only been playing around with it for a few days. I must say so far I'm really excited. I'm ALMOST ready to commit to buying the actual box when it comes out in August!
The one thing that's holding me back is HDDVD/Blu Ray playback. I've recently ripped all my HDDVDs to disk (Well over a TB of data!) and want to play these on Boxee. Are there plans to support these? I think I can say that without this feature, I will not be buying a Boxee box. But if this support is added, I'm all in for sure.