You want to get the article out to as many directories as you can. The directory and/or catagory does not matter at all. link relevance is determined by the title and content of the page the link is on, not the catagory, not the site theme, but rather just the page it is on. So get that article out to as many places as you can.
You should even hope that other blogs and sites pick them up for reprint also. The more exposure you get will only help as you climb your way to the top.
Jim