Just saw the article on DH about an upgraded of PowerDVD being able to play Blu-ray 3D discs when they become available.

I have a Blu-ray drive in my machine and am looking for a new monitor so I want to get one that could display 3D discs.

So what do I look for? Can any monitor on the market today be used for watching 3D or do I need to look for something special?

ATI 5-series video cards (except the lowest 54xx) are supposed to be 3-D ready.

Here's some 3D monitors that I know of.

Samsung 2233RZ 22IN 120HZ 3D

Acer GD235HZ Bid 23.6IN 3D Ready 120HZ Widescreen

Viewsonic FuHzion VX2265WM 22IN Widscreen 120HZ 3D Ready LCD Monitor

So for 3D, are we saying you need an appropriate graphics card and frame rate doubled monitor?

You do need a 3D monitor.
The graphics card needs to have a dual link DVI connection and a dual link cable to the monitor. This means it is a full pin bank on the DVI connection. Most modern graphics cards, I think should support this, although I've read the HD 5xxx cards are the best for rendering HD.