Get ready for more AOU changes to the checklist this year. Read a little about these proposed changes at: http://www.aou.org/committees/nacc/proposals/2009-A.pdf
As many of you already know, Red Crossbill is probably actually a complex of eight species, or at the very least eight "vocal types". The first one to be officially recognized by AOU is likely to be Loxia sinesciurus.
Read more about the current and ongoing work on crossbills at these links: