As the good folks over at the SANS Internet Storm Center have noted in a diary post, the National Institute of Standards and Technology [NIST] is requesting comments for changes it is proposing to make to the Digital Signature Standard, FIPS 186-3 [PDF], and has published a notice in the Federal Register. The key changes are clarification of implementation instructions for the approved algorithms, and approval of addition pseudo-random number generators for key generation. You can get the complete summary of proposed changes here [PDF].
Comments can be submitted up until May 25, 2012. The Federal Register notice page has a comment submission link; comments can also be submitted by E-mail to the address in the notice.