I know I'm resurrecting something pretty old but I've got a question along the same lines.
I know footer style credit links are supposed to be effectively pointless for link juice or whatever, but I'd have to imagine that credit links such as;
Web Design by Orange Digital
Serve as decent citations.
Now I just took over the SEO for this company who used to have a different name and have a lot of credit links that say;
Web Design by Former Company Name
My question is, is it worth going out of my way to alter the credit link to put an updated name in it for citation reasons? Keep in mind this niche does not have map listings activated in my area.
Cheers.