Thanks to the nice and powerful tool GNU Source-highlight (http://www.gnu.org/software/src-highlite/) qgit now supports file viewer with syntax highlight.
Advertising screenshot: http://digilander.libero.it/mcostalba/src_hlt_3.png
I've found GNU Source-highlight quite easy to integrate so I post this as an info/hint for people that could be interested (read gitweb team).
A patch as been pushed to git://git.kernel.org/pub/scm/qgit/qgit.git
Thanks Marco