Dave Weagle, the genius behind the DW Link suspension that Iron Horse, Ibis and Independent use, has developed a new suspension design:  split pivot suspension. Dave is also a really great guy and a downhiller!

Concentric pivots. 

Check out an explanation of the design at BikeMag.com and the official web site Split-Pivot.com

Update: Split-Pivot discussion on RideMonkey.com