NIST temporarily closed — will that have a negative impact on the future of cryptography?
This closure is a rather stupid thing, because the Web site is not closed: indeed, there still is a machine, somewhere, which responds to HTTP requests and returns the "we are closed" page. It would have cost zero effort, and zero extra money, to simply let the Web site run and keep on serving PDF files.

For crypto development, this means that until the US Republicans and Democrats finally agree on who is the Alpha Male, developers will need to find the relevant standards and test vectors elsewhere. A lot of the information is duplicated elsewhere; e.g. FIPS 180-4, which defines the SHA-* functions, has also been copied as RFC 6234, which is still available. Also, many people already have copies of the documents they are working on (I know that my "Downloads" directory must have a lot of NIST pdf files in it).

In any case, crypto development, by necessity, works at the pace of research, with a lot of thinking. Thinking has not stopped. Publication of documents, writing of standards, organization of meetings... operates on a time scale counted in weeks or months, not days. A few days of bureaucratic-induced closure is not enough to show up on the big picture of cryptographic advances.