The next application deadline for the Administrative Supplements for Collaborative Science (SCS) program is May 15, 2012. Applications may be submitted on paper, as described in the announcement, or through the electronic submission pilot for administrative supplement requests.
The SCS program provides supplements to support new collaborations that will advance the aims of the parent R01 or R37 grant, which must be actively funded through at least November 30, 2013. The most compelling supplement requests propose to take advantage of new scientific opportunities and involve collaborators from other disciplines.
SCS awards are very competitive, so you should talk to your program director to assess whether your ideas fit this program before writing an application.