You should try the
offical way to get support. They do not watch all the threads closely.
Which OS and which build do you use?
Did you read the
"Troubleshooting Windows" section?
I'm running a 168B+ with almost no issues (except non-functional hardware buttons with current drivers) - but only when running my notebook in the docking station.
When running my notebook outside the dock, I get a black (blank) screen when I try to attach my Lenovo USB display together with my 168B+. If I remember it correctly, the first attached USB display is fine, but the second will fail. Strange: I borrowed a second 168B+ and was able to run both monitors at the same time. Attaching only one display is fine. Connecting both using the docking station is also fine.
My conclusion: it seems like there are USB issues, depending on your configuration.