The mini 10v has no hdmi-out. As I saw in a promotion video from dell on youtube, it's the mini 10 that was designed for multimedia features (and personalisation). So, that sounds like the 10v might be not the best choice for a media center.
If you want to use it for web and mail applications, it works just fine, but as the display size is only 1024x600, some websites and even some application windows don't fit (they are too large), so that you have to scroll a lot, and sometimes you cannot see important buttons or something. I think, the os- and web-designers and the application programmers will have to keep that in mind for the future and it will get better.