I've done it extensively. One issue to look out for is overscan. Sometimes the ability to disable overscan is hidden or missing completely. Then the TV manually compensates for it, which causes the "unsharp" look that some people are reporting.
Ok, I just re-read what I said above, and it's tough to understand...
Basically, you have
Now, even over HDMI, some TVs will force overscan. You don't always realise that it's overscanning, because sometimes the image is auto-scaled to fit the dimensions of the display. if you disable the auto-scaling, text appears crisp, but then the viewable desktop runs off the edges of the display.
Possible solutions:
1) Use your video adapter to compensate
2) Find a way to completely disable all scaling and overscan
Option 2 would be the ideal. On some Samsung Series 5 LCDs, you need to rename the "source" from "HDMI" to "HDMI/PC". Then overscan is disabled (obscure, I know).
For an example of the issues that may be seen:
Comparison of common interpolation methods
Note especially the ellipse surrounding the text. For very thin edges, you'll begin to see degradation like that if overscan is enabled.