Can anyone say if using <span title='keyword'> for link text has any effect on keyword density etc, or more specifically if it is known to help in the serps?
You'd be better off using <A HREF="..." TITLE="keyword">. I used to think it helps in SERPS, but now I'm not so sure. Can't see how it word hurt though. Cryo.
I think it would be too easy to spam - whichever method suggested in this thread used. So no: not likely to help.