Sure though honestly I don't work it in to muchyet myself BT.
DOes it need Timidity? No.
Will it work with emulated USB Keyboards? Not real sure what you mean by emulated there. Personally I just have a midi keyboard run through my RME soundcard, and through Jack, patched into Rosegarden. Works fine like that.
Does it support Quantizing? No clue sorry.
This seems to suggest it might be able to though...http://rosegarden.sourceforge.net/tu...chapter-8.html
"The tools toolbar has several of the same tools found in the main window, but it adds icons for step recording and the quantizer."
It it easy/possibly to load soundfonts? I dont use them as I run it through Kontakt instead when I use it, but a long time ago I think I tried, and I had to use an external soundfont program to load them, but it has been some time and I honestly can't remember or even garuntee it still works that way.
Can't grab you a screenshot at the moment, not enough time, remind me later and I can try to grab some and even try to do what you are asking. To be honest, its notation editor is OK, but not quite as nice as others. Still needs a bit of work. Though I have not tried 1.5 which I believe they recently released, I should probably do that sometime.