In no particular order for the following departments (will update as I find them):

Dept. of Interiror (DOI) 8 April 2011:

Based on the developed plans, approximately 52,300 of the 68,900 Department of the Interior employees projected to be in pay status will be furloughed at the outset of a suspension of activities. [...] Approximately 9,500 employees will be designated as excepted or emergency personnel to complete shutdown activities and to protect life and property.  This number will decrease if the shutdown goes beyond two to three days as facilities are secured and other shutdown activities are completed.  In addition, a limited number of employees providing administrative support for essential functions, such as budget, IT, finance, and contracting, will be considered essential.  Some of these employees may be required on an intermittent basis after the initial shutdown activities are completed.

Dept. of Treasury 8 April 2011:

In total, the Treasury Department has approximately 127,000 employees. In the event of a lapse in appropriations, approximately 92,000 would be furloughed and 35,000 would remain on duty. Because the possible lapse comes at the height of the annual tax filing season, the majority of these employees would be excepted from furlough to handle essential tax filing and service functions of the IRS, with the remainder primarily working in Treasury programs that are funded from sources other than annual appropriations. Treasury will continue to revise its plans as circumstances warrant. Each Bureau under the Treasury has discrete functions. Continue reading →

Dept of Agriculture (USDA) — PDF documents (all agencies / bureaus have separate plans listed)

More departments after the cut: Continue reading →