lucy24 - 11:52 pm on Nov 21, 2011 (gmt 0)
For what purpose does he need the information? I suppose it's for making payments to the accounts and not for receiveing payments - because the only way to charge another bank-account is direct debit - a popular way of payment in some european countries but not very common in the US as far as I know.
You're behind the times. Direct debits (and direct deposit of paychecks) took a while catching on in the US, but they're very common now. Unlike a credit card, a bank account doesn't expire every two years, so it's especially useful for recurring charges like insurance, utilities or, ahem, web hosting.
You don't see it that often for one-time charges, though. Partly because people with working brain cells would hesitate to give their account information to a company they've never dealt with before.