Gtksourceview is a text widget library that extends the standard Gtk+ 2.x GtkTextView, f.e. enables syntax highliting in Gnome apps. this one was released with unstable gedit 2.3.1, but as a library is quite mature and might be useful for Gtk+ developers. have fun, artb.
Created attachment 11656 [details] gtksourceview-0.2.0.ebuild
i have an ebuild locally, but it wont go in until something really depends on it.