I don't know if 0.0.9 installer ever came out. You can use the manual install instructions though if you're up to it.

Upgrading is fairly easy, you basically install 0.0.8, format the /and partition as described in the manual install docs and untar the 0.0.9 or gingerbread version there. (If you use multiboot you might have to copy the new kernel over too, if there is one.)

nitdroid forums are the best place for info and discsussions about it