just adding my vote for ring select>connect another spiffing one is if you need to do the old 1 edge transition to 3 edges (retaining quads and upping local detail), do a loop select and do a flat edge extrude.
I normally either use modify-connect-chamfer the connect will add a loop in the centre of your currently selected polys then the chamfer will divide that new loop into quads. John
[ QUOTE ] edge ring select, connect then constraint to edge and move-tool on the verts if i want the new edge loop to be non-centered. [/ QUOTE ] In the connect dialog box there is a spinner for "slide" that lets you slide the connecting edge around without needing to create it and then switch your constraints.
another way you might use is select an edge that is at a right angle to the loop, hit ring instead of loop, and use connect. then you can choose how many loops to add edit: bronco, do you need the chamfer when the connect tool can specify the number of loops to add?