I have created a new plugin called 'HighlightCurrentLineInEditor' which unsurprisingly highlights the current active line in the editor in a nice shade of blue.
I'm sure other enhancements will follow. Perhaps the ability to choose the color or change the length of the highlighted section ( currently stuck at 150)
As is the fashion (started by me :)), I have posted the code on Google Code at http://code.google.com/p/dxcorecommunityplugins/
Binary Downloadable from http://www.rorybecker.me.uk/DevExpress/Plugins/Community/
P.S. My apologies to AC for this not being the next 'Testing refactorings' post