[Zope] ZGDChart tips?

[Scott Krajewski]

Hello,

I'm trying to utilize ZGDChart to make some graphs of data from a 
PostgreSQL database.  The website users go through 1 to 3 pages of 
forms to specific what data they want a report on and then the 
numbers are generated in the final action DTML method.  I really want 
to have a graph on that page and so far have found ZGDChart as a 
tool.  Unfortunately it looks to me like none of the data methods 
work for my situation:

DTML-method : the method in the chart needs to receive variables to 
get the data, I can't find a way to pump them in
Tiny Table: If I could insert data into a TinyTable with my final 
method action it would work,  But that doesn't appear to be how 
TinyTable works
ZSQL Query: need to pass variables into the query.  It's not a 
vanilla lookup but a calculation too.
Python Script: Can't say I know enough about python to try, but it 
looks like I'd run into the same variable problems.

Any suggestions?  Any other products out there for generating graphs in Zope?

thanks,
Scott