I am using YARPP for quite some time and I am very satisfied with the algorithm if properly configured. Related entries are, if the threshold-level is set high enough, indeed related. AFAIK no other plugin matches this rate of accuracy as YARPP does.
Since I have already more than 2000 entries on my blog, and it nowadays happens more often than not that I link to my own entries (for reference, etc.), I thought it would be great, if YARPP could pick up internal linking as an option for relatedness.
Thanks! This is something I’ve thought of in the past, but picking out URLs and parsing them can run into a lot of problems… If I ever release a test version with support for this, it would be announced on twitter @yarpp, in case you want to stay posted.