Music Notation Software For Unix?

CapnCheapo asks: "I was just wondering if there has been any progress on a Finale-quality music notation system out there for Linux yet? There are plenty of sequencers and simple notation programs, but I need a program that can do heavy-duty scoring, (30 staves, transposition, score analysis, custom beaming) in a graphical environment. Lilypond is great for typsetting, but is not an ideal environment for playing with musical ideas. Thanks!"