I know you guys are busy with getting all the WOTLK info into the addon, but could you possiblly make the quest boxes, IE what shows on the map for a area to kill mobs for quests to look a bit better, I know it serves it purpose quite well, but maybe shade the borders, or make the area look like a glowing area, just something to make the areas look less boxy and in my opinion less ugly.

 Putting a border around the edge might actually make it look more "finished," actually.  I don't think you should round the edges or fade it out, 'cause that'd be adding or losing information, and assuming the boxes are relatively accurate (which I have found them to be in most cases), you don't want to do that... but just making the edge a brighter color or something could do wonders...

-x

I'm not trying to sound like a jerk at all, but I would like Carb to be feature complete (or mostly so) before it gets all prettied up.

If you look at any other quest objective addon except QuestHelper, such as MobMap, its just as ugly.  At least Carb colors its stuff.  And QuestHelper I have found to actually lose objective information because of how it displays areas. 

 Quest area are one of the most expensive things to draw on the map, which is why there are several options for how many are drawn at a time. They are a balance between accuracy and memory use. Doing something to the edges would probably double to triple the update and render time. At some point I will try a few other options for how they are drawn.