Last time I updated, I had just passed Steely Dan and was about to move on to Stereolab. Since then, I've deleted 291 tracks totaling 1.4GB. That brings the total deleted for the S's to 683 tracks and 3.9GB.
Total overall: 4706 tracks baleeted - 21.7GB liberated.
My goal of finishing by the end of this month is looking less and less likely. It is still possible, but I think that October is more reasonable. I only have about 3500 more tracks to go through, so we'll see.
UPDATE: S's are completed. Total tracks removed: 4744 Total GB liberated: 22