VST support and virtual instruments
SSS5 wrote the topic "VST Support?." I join their desire that a possible version 3 of Musescore include connection to external Vst's and be able to include libraries of instruments like Garritan Personal Orchestra.
The solution through "jack control", "loopBe1" and other external programs seems to me quite complicated and doubtful. However, most notation programs (sibelius, overture, notion) can use quality instrument libraries (GPO, VSL or Kontak) with a single click, just as in Musescore the Soundfonts files sf2, sf3 or sfz are used.