I like fast – it's how we actually make money in this business. I'm a big keyboard shortcut guy myself. As for the right menu stuff, that sounds good – I'll put that on the list, but I think at least some of that will have to wait until a later release.
I've been working to improve the graphics of vSigX. (Among other things, I'd personally like to have more of a margin on the left side, or at least be able to center the graphics in the window.) I'm also working on the undo/redo system a bit.
I think the patch librarian functions I have added should help you audition patches before editing them.
I've also added a text editor component to vSigX, so that should help out as well, and I hope to add a wave editor component before the next major realease…