NIH
Revised guidance on resumption of NIH extramural activities including revised due dates is located here http://grants.nih.gov/grants/guide/notice-files/NOT-OD-14-007.html
Guidance on resumption of NIH extramural activities including revised due dates is located here http://grants.nih.gov/grants/guide/notice-files/NOT-OD-14-003.html
NSF
News on the resumption of operations is located here http://www.nsf.gov/bfa/dias/policy/postshutdown.jsp
Revised due dates are located here http://www.nsf.gov/bfa/dias/policy/postshutdown/reviseddates_oct22.pdf