Question: Are there more things that can be obtained using SSI's?

Answer: Yes. Is this a complete list? I'm not sure. Not all are passed by all servers. Different SSI's are enabled on the server that is sending you the web pages. Not all of the SSI's listed below work from my server. Explore and enjoy

server side include (ssi)

HTTP_REFERER /ramos/cursos/tutorials/start/
auth type (none)
content length (none)
content type (none)
this document name is ssss.html
document root (none)
document uri /trio/tut/start/ssss.html
gateway interface (none)
http accept image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */*
http user agent Mozilla/4.7 [en] (Win98; I)
path /usr/sbin:/usr/bin
path info (none)
path translated (none)
query string (none)
romote address 208.223.205.130
remote host gmfw1.gm.com
remote ident (none)
remote user (none)
request method (none)
script name (none)
server name www.usd.edu
server post 80
server protocol (none)
server software Netscape-Enterprise/3.6 SP3
query string unescaped (none)
query string (none)
gateway_interface (none)
HTTP_COOKIE VisitorName=Generoso; WWHCount=0; WWhenH=951833063270
REFFER /ramos/cursos/tutorials/start/
FROM (none)
FORWARD (none)
Last_modified February 02, 2000
Date Local February 29, 2000
Date Local (formatted for time) 08:24:50