I was just at Circuit City and they had pamphlets everywhere mentioning the GBA SP correction. They were on the door, in the game aisle, on the game case, next to the playable GBA, and at every register. They went out of their way to make sure everyone in the store knew it.
The Toys'R'Us and Best Buy across the street wouldn't price match as they probably got word of the correction as well.
The CC ad looks pretty clear and even mentions the regular price and the savings, not like the usual misprints where there is just an incorrect picture. The CC website had the $59.99 price as well, so it seems strange that it really was a misprint.