Edge specific Bevel is available in Blender 2.63To Bevel, in
Edit mode select first an edge (via 'Vertex' or 'Edge' select mode, "
Ctrl+Tab"). Next in the 3DView Header, click "menu:
Mesh > Edges > Bevel". In the ToolShelf properties that will appear, change the "
Percentage" value to increase or decrease the amount of bevel applied to an edge. Important Note: there's a caveat, Bevel is based on vertex normalisation at present which means adding bevel to a 'corner' will produce a different level of deformation based on the averaged vertex-normal between adjoining elements
for more information on this read the tutorial here.
