"A few days ago you published a hint about keyboard navigation in Mail.app. I have a way of accomplishing the same thing as in that hint, but it's with a plugin instead of a script. It's a little friendlier to use than the script because it doesn't have to be triggered with a shortcut (it's always active). It's also faster.

For those who missed out on the previous hint, the plugin (TypeAheadFind) adds keyboard navigation to the Mail.app message viewer. While the message list has focus, type a few characters - the selection will jump to the nearest message whose From, To or Subject columns match the typed characters. It's similar to what happens when you type with a folder in front in the Finder.

This is a Eudora feature that I couldn't live without. I never use the mouse for navigation in Mail anymore, the keyboard is much quicker."