Online attribution of instruments to staffs.
After a score was uploaded to MuseScore.org, the uploader should be able to attribute online the instruments he/she wants to each staff. He/she should be able to pick these instruments from an online sound bank available on musescore.org (containing Sonatina etc.).
Comments
Are you referring to soundfonts? musescore.com only contains one soundfont - it would impractical to include every soundfont that exists im the world. Instead, for 2.1, it will be possible to upload the audio for the score at the same time you upload the score, so whatever soundfont you are using yourself will be what others hear when they play your score.
Also note that if you are a pro member or if you are reading a score from a pro member you can change the sound of each staff individually using the Mixer feature.