There is a desire by various institutions, like CU Boulder, to add more identifiers into VIVO.
Some of this was done in OpenVIVO - see the links under Weblinks at: http://openvivo.org/display/orcid0000-0002-1304-8447
CU Boulder is already adding the following in their 1.9.3 instance via data properties with range of anyURI:
Ralph from UAB mentioned:
- arXiv Author Identifier
SSRN Author ID
National Provider Identifier Standard (NPI)