On Nov 25 I had a text link placed on a high PR homepage of another site. Since then I cannot find it in my backlinks or any of the other sponsor's backlinks. Neither my pageranks nor SE rankings have been helped any. Several of the other sponsors also seem to be doing poorly in these areas. Any thoughts??

You can PM me the site and I could take a closer look, but generally it can take 1 to 2 months before you will see a PR benefit or backlinks show up.