The best linking system I know is…

 

https://extranet.imb.org/sites/HIS/default.aspx

 

where you’ll find codes for sharing data about each unreached people group in the whole world. This registry is maintained by a consortium with none other than SIL (Wycliffe), JoshuaProject.net, IMB (Southern Baptists), and GMI (Global Mapping), among others. With that kind of group involved, you won’t go wrong. Interested in learning more? The word on the street is that this group is staging a get-together in Dallas in 2012. Stay tuned to Brigada as we learn more regarding when this meeting might occur.