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Eventually, I'll be incorporating specific Mac OS 10.6 related instructions into this wiki page, but for now, I've verified that these instructions (http://) work with Mac OS 10.6 (Snow Leopard) and PostgreSQL 9.0.3. Do note the typo in the section containing information on setting up the operating system's "postgres" user. The instructions say "sudu" instead of "sudo" on all but the first line. Also, the configuration options are fairly generic aside from the Mac OSX specific locations and the bonjour flag and could be used as the basis for setting up postgres in other linux / unix environments (save, again, for setting up the operating system's postgres user).
On Mac OS 10.6, you can configure a postgres startup script via the following plist file (this assumes that all your paths are the same as those in the instructions provided above, otherwise changes would be necessary):
# /Library/LaunchDaemons/org.postgresql.PostgreSQL.plist
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