I tried this app on my DX (rooted and 2.2) I changed it from 240 (default) to 200.
search the market for "LCD Densitiy Changer"
Dev Forum thread
[APP] LCD Density Changer 3.0 - create HighRes screen effect - xda-developers
Before LCD Changer
After
search the market for "LCD Densitiy Changer"
Dev Forum thread
[APP] LCD Density Changer 3.0 - create HighRes screen effect - xda-developers
Before LCD Changer
After