Several congressmen from the Committee on Oversight and Government Reform sent an exasperated October 25 letter (their second appeal) to the Office and Management and Budget demanding a staff update this week.
The Fed chairman usually testifies before the House Budget Committee in mid-January to give the panel an economic update before the president submits his budget request to Congress.
In early October the Treasury released a pre-election economic and fiscal update indicating that after 14 years in surplus the budget balance was set to slip into deficit.
In his reply, Mr Brown said the Treasury would update its predictions about the economy and public finances in the pre-Budget statement, expected next month.
This year, Nokia is going both premium with its large Lumia 900 phone, and budget with a promise of a range of cheaper and simpler phones (now that the "Tango" update of Windows Phone is becoming available).