Hey Janet,
Like Jordan says, putting a bit of content around each to provide a bit of background info about each service would be good, rather than just a list of links to other companies.
About the follow / nofollow issue, as long as the sites aren't spammy, there shouldn't be a need to nofollow them. I've heard it reinforced several times recently that as long as you trust the website you're linking to, there's no need to nofollow the link. Adding a nofollow to the link is like saying to search engines, 'I don't trust this guy' - but if you didn't, why would you link to them?
Anyway sorry for the rambling but where the links are duplicated, nofollow, otherwise there's no need.