NIST CMVP will be closed if the US Federal government is shut down on April 12th. Any work requiring NIST CMVP involvement will be delayed until the US government executes a resolution to the budget. A shut down will impact all FIPS 140-2 validations, revalidations, maintenance letters, and algorithm testing.
InfoGard and other FIPS laboratories will remain open. Lab testing services that do not require NIST CMVP involvement will continue.
If a shut down does occur, I expect that the CMVP's recent excellent review times to be significantly impacted.