Since 1954, the International Mozarteum Foundation has been steadily editing the complete works of Wolfgang Amadeus Mozart, and their critical editions have become essential items for musicians and musicologists. This month, they placed the fruits of their collective labors online on this site, and it is truly a glorious achievement. Currently, there are 25,734 pages of music and 8,441 pages of commentary, and this number will increase in the future as more material is added. The Foundation's future plans include placing its collection of autograph scores and original sources online as PDF files. Overall, the site is rather easy to use, and visitors should note that the site does receive a great deal of traffic at times, so it is best to also be patient if there's a short delay in returning materials.