I have been running some performance tests in the Ruvo Mini Cap 7. The machine out performs many of the Netbooks and UMPC currently in the market, I would say easily.
I prepared a video for todoumpc.com (Sorry guys, it's in Spanish), where I played DVD, 720p and 1080p videos and in my opinion the machine handles the DVD and the HD 720p videos really well. The HD 1080p skips frames but I think that that with some tuning, selecting a good player, good codecs and a good video format, probably it can handle too this HD format.
I also installed Ubuntu but still too early to share my impressions about this experience. The only thing that I can say is that it runs out of the box without me having to change or install anything.