I know it might sound a stupid question but I still want to post up here to confirm. If we have two sites and the link of each site is placed on the footer of the another, is it considered to be link schemes defined here http://www.google.com/support/webmasters/bin/answer.py?answer=66736. The possible issue is that when the number of pages of one site goes up to say 1 millions, the link will appear on alot of pages of irrelevant content. If it is, then what happens if it is a network of sites belong to one company. Soft32 for example, they place alot of sites in the footer. Any ideas?
My recommendations in this case: It will be much better if you make a links from one site to another with no baklinks. if you wish to make a links from all pages, even with irrelevant content, do it in stile like this. This site was designed/developed/etc.... by <a href="http://.....">http://.....</a> Nobody can't tell you anything about this link, because this is not paid link. Company produce website for you and you mention in in the footer.
luxs this is something that Matt Cutts has spoken about and Google said they would be cracking down on that type of link scheme too.
If you have only one side-wide link, what they will cracking down? your website or website of the company involved into producing your site?