Flashblock on Firefox does the same thing, and I run with it rather than AdBlocker. Blocking flash removes the most painful advertising, leaving more appropriate, less in-your-face advertising as a sort of compromise for the vendors. The 'net is noticably louder when I go onto a machine without flash being blocked.

You don't need Flashblock to do that. Firefox itself allows you to set plugins to "click to play".

Stopping rollover ads is worth it alone. Does stopping ads in this way prevent ad revenue?