So the epilogue of the story with BoA is that I decided not to transfer to Chase, but to get another 0% deal, and I opened up a Discover card for a 13-month transfer at 0% with no fees. Can't beat that deal.
I was explaining how the balance transfer arbitrage game works to a friend of mine and I said that I really wanted to pay down my current card so I could start playing it. Then it occurred to me that I am dumb. All I have to do, to play this game right now, is to pay the minimums every month on this 0% deal I have going, and put the rest into savings where it will earn interest. Then at the end, I can pay it off with the money I have saved up, and I'll have earned some money in the meantime. So I will probably do that. But once it's paid off, I can get a 0% on something else, and do it for real. Hooray!
I'm also considering getting a mailbox at the local UPS store - I'm just paranoid now because a multi-thousand-dollar check from one of my CashDuck ad networks didn't materialize, and it was mailed on Nov. 30th. See, I don't have a particularly large mailbox, and sometimes the mailman (if we get the lazy one) just puts the mail into the holding hooks underneath. And occasionally mail gets picked up by the wind and scattered down the street. I contacted my guy at the ad network and told him that, and he is going to put a stop payment on the check and add the amount to the next check, which should be cut in a few days. Hopefully nothing happens to THAT check because it is twice as large as the first! I am beginning to really appreciate the networks that pay by Paypal or direct deposit - not only faster, but less worrisome.