Does it actually do anything? I just get a spew of console output when I try to use it.

x_order_2: colinear! colinear! ...

Oh, and I just suggested to Bryce that we remove the "colinear" from Release Notes :) Indeed this warning is now only triggered by the calligraphic tool.

As for the tool, why, it does draw nice lines and it's fun to play with. I'm not sure about its practical usefulness, but I did not play with it too much. Besides, there are some fixes for this tool in Sodipodi which we need to port over (the person who created this tool originally is now working with Lauris on Sodipodi).