My setup changed considerably since the last picture so here's an update.
What you see here is an X200 in the UltraBase on a 3M LX550 notebook stand (cool stand that allows you to put the laptop almost vertically).
X200 has the AFFS screen mod.
The monitor is a HP ZR24w (24", e-IPS, WUXGA) connected to the UltraBase with a DisplayPort cable.
Speakers and keyboard remained the same from the previous setup.
The mouse is a Logitech VX Nano.
There's a Hitachi Simple Drive 1TB external USB HDD behind the notebook.
Since I work at home, this is my all-round setup and I'm quite happy with it. I have enough screen real estate to work productively while the laptop remains very portable if I need that.
Actually the notebook stand just came in today so I'll be checking out in the next days how it works for me. It blocks the front of the laptop so I can't use the card reader and it's hard/impossible to reach the lid latch and power button on the UltraBase. But it does put the screen in a lot nicer position -- higher and closer to me (without that I had problems reading the screen since I'm sitting much further away from the laptop than normally).