Forum Moderators: Robert Charlton & goodroi
The only factor that PageRank depends on is inbound links from other quality pages. But raising PR alone is not going to make any page get good rankings.
A "keyword footer" is, in my opinion, a poor idea. Matt Cutts has pointed out this technique several times as something that Google does NOT like, because it's only there to try to influence search ranking and it's not there to make the visitor's experience better.
Instead, I suggest you study many posts in this forum and elsewhere, with particular attention to things like title tags, meta description, and particularly UNIQUE urls. Forum software is notorious for creating a problem in the area of unique urls unless it is appropriately modified.
1. Have you been ensuring that title tags and meta descriptions are unique and specific to their page content?
2. Check out this thread for some detailed information about getting forums well indexed:
[webmasterworld.com...]
Pay particular attention to the points that g1smd makes toward the end of the discussion.