Nuclues is a great system, but some things aren't the way (I think) they should be. This is how I want it:
/archives/for the archives index.
/archives/2003/for a overview of a year.
/archives/2003/08/for the overview of a month.
/archives/2003/08/04/for the overview of a day and
/arvchives/2003/08/04/featurerequest/for a specific post. The last keyword should have no caps and should be a simplified title of the post it refers to.
/categories/for the categories index.
/categories/categoryname/for the overview of a specific category.
I have tried something of this sort over at http://wannalookgood.com.
The trouble is ofcourse the fact that as of now, it doesnt support all possible scenarios in which a link can come. One of these days, I am going to finish that plugin so that it supports everything and works smoothly. Keep checking the forum.