One thing that struck me is that there are two ways of using the plug PC. A client, or more likely as a server. And these version's of Debian are aimed squarely at the client market. For example, Network-Manager is great for client use but not for use with a server. And it seems from my observations that the reported flakiness of the wireless is down to Network-Manager ( I can't say for definite yet, but it certainly looks that way) . And on the whole, a GUI is wasted on a server most of the time, just consuming cpu.
I think it would be really nice to have a basic version of Debian with say, just SSH, that an efficient, lean server could be built on. ( Just my 5 cents)