We're at the Wikiconference USA session on OCLC, and there's a request to add the OCLC number to the citation generation template in the source editor editing bar. One person here thinks this task might be part of the Citoid team's portfolio, and says if it's not, you'd know who does this.
We're all really enthusiastic about how the ISBN can generate quick citations, and hoping the OCLC number could be made to do the same thing.