mod_ruby Apache::* tutorial

I'm having a hard time finding tutorial (or documentation other than  
the API in the wiki) for using Apache::request to get access to get/ 
post/cookie via eruby/mod_ruby.  The only tutorial I found uses CGI  
from inside eruby, which seems unnecesary.

Is there documentation available?  Or if there's somewhere I could  
get started, I could post my experiences to the wiki in hopes of  
building a tutorial for later users.

Thanks,
Mat