I promised my friend Armin that I would get his weblog “MacDevCentered”.
He has got a pair of cool AppleScript Plug-Ins that show all emails send to or received from a certain person in your Address Book. I think this is a functionality that should ultimately be part of the Address Book/Mail combo.
Got to this page to get instructions on downloading, installing and using the Plug-Ins.
Kewl. You'd think Mail's smart mailboxes would have an option of "From Person in Address Book" to achieve this. Then again, I guess you can just do a search and pick the "From" field.