The trackback model has been completely overhauled to improve its results.

The current system is really different from beginning to end.  Very little of the original code has remained.

Jeff has worked on this effort for quite some time and the results are quite good.

In our fairly extensive testing the results are that the system should complete about 250 sites per day.  In that time it should achieve from about 10-30+ links per site.  This is far more than the old system was able to achieve.  Plus, the new links are of a higher quality...so they count more.

