Hi Scott,
There are many schools of thought on where to place your links. Some say at the top, some say down the left margin, some say down the right margin, some say across the bottom.
The main thing is to make it easy for your visitors. If they cannot navigate your site easily, they're gone. Simple as that!
Although you don't often see it, I have read that links placed down the right-hand border should be used as most people tend to read, or scan, pages from the top down and left to right. This way they are reading your content right off the get go rather than reading links that could take them somewhere else.
It really is a judgement call. Look at your site as a visitor and not as a site owner. What do you prefer in other sites that you visit?
I use a combination of across the top and down the left margin. You can take a look at:
hth,
Mike