Still not an official release, but I have made some updates to the
Csound syntax highlighter for Gedit.  Download it here:
http://www.thumbuki.com/csound/files/mailinglist/csd.lang.2010.07.09.zip

Install the three language files here:
~/.local/share/gtksourceview-2.0/language-specs

And if you happened to install the first draft, be sure to delete
csd.lang, as it will conflict with the new csound_csd.lang.

Whats new? More things highlight, fixed a few bugs, and added orc and
sco file support. Still not perfect, but better than nothing.

Best,
Jake