OK, I emailed IRS Email Tax Law Assistance about 2 weeks ago, and finally got this reply:
"If you do not meet the income requirement to file a federal tax return , but must complete a Schedule B, Interest and Ordinary dividends for purposes of Reporting Foreign Bank and Financial Account (FBAR) information.
You should place your name and social security number in the space provided on the Schedule B, then complete part three as required, attach a statement explaining that you were not required to file an income tax return, but must submit the Schedule B for FBAR compliance requirements only.
File the Schedule B as a stand alone document to the address where you would normally submit your federal income tax return if you were required to file. Send this information to the Department of the Treasury, Internal Revenue Service, Austin TX., and 73301-0215 USA for processing, no other actions are necessary."
So I guess that's the answer.