I'm not really sure, but I think that Django (because of Perl) doesn't use the FastCGI protocol, but the SCGI protcol. SCGI is not supported by Hiawatha.
About your confussions:
1. Please, read
this page. It will clear it up.
2. Please read question (and answer) 16 of the
F.A.Q. first. What you need to find out is if you can use cgi-fcgi to run Django as a FastCGI daemon. My guess is that your solution lies somewhere in the cgi-fcgi tool.