It still makes way more sense to me to get a socket 370 board. First, it's going to be a more modern board / chipset. It's interesting about the 815 chipset slot 1 boards mentioned, but still I don't see any advantage in trying to get some (incredibly?) rare board just in order to continue using the adapter. Second, running a socket 370 processor on a socket 370 board has to be better (more stable, efficient etc.) than running it on a slot 1 using an adapter card. Since you're currently looking for a new board, it will be easier / better to go for a socket 370 board. Plus, you have the added advantage of being able to sell the adapter card to offset the cost of the new board.