Just noticed a new addition to the growing list of important libraries with digitization projects:http://search.obvsg.at/primo_library/li ... do?vid=ONB
Österreichische Nationalbibliothek Wien has high resolution (300 dpi) color scans as jpg's only, but easy to save page per page...
I noticed First editions of Haydn (String quartets, Symphonies in complete parts) and Beethoven (Violin concerto parts), Schumann Scenes from Faust (complete score)
There are many more scans of newer editions, that are inaccessible because of copyright protection.
No browsing option yet, but one can search for a frequent word in the title ("für", "pour", "per").