poster_boy - 11:48 pm on Dec 2, 2007 (gmt 0)

You should be able to accomplish this with two separate campaigns - not accounts.

Campaign #1: Target = United States, Bid = $0.50, Ad text = General, Keyword = Blue Widgets
Campaign #2: Target = Boise ID, Bid = $2.00, Ad text = Boise specific, Keyword = Blue Widgets

In everywhere but Boise, your "Blue Widgets" keyword should pull from from Campaign #1, while in Boise... your Campaign #2 version should be customized enough and at a high enough bid to win out in that market.

What was their rationale for requiring two separate accounts?