I have a not very content rich site with 150 html pages and perhaps 60 pdf files. It only has a PR of 1/10 and is being beaten in the rankings by sites with PR 3 - 4 with both more inward links and more pages onsite featuring the search phrases.
I decided to pop in the footer links on every html page as a start (because that might improve the signposting to main sections on the site, and main key phrases). And I also resolved to start work on inward linking.
So, footer text links, lots of people have themm, but do they help?