I sort and view my tasks by due date then priority, which works great. But it would be neat, if the priorities had a different colors that would make them stand out, such as read for high, green for medium, etc...
Only if you use a userscript with something like Stylish for Firefox. Vin made a nice one that color codes priority that you should be able to find with a search. I will post the link here later in case you can't find it.
We already use varying shades of green to distinguish the different priority levels. If you want more contrast, you can use the Stylish plugin that Anders has posted.