This framework makes the creation of association and initiation forms in Sharepoint workflows much easier (from 400 lines of code to 30 or 40 lines of code); this is a framework, not a code generator !
In the meantime you can take a look at http://sergeluca.spaces.live.com/blog/cns!E8A06D5F2F585013!3746.entry
-The framework can be downloaded (Serge.Luca.WorkflowTools.AspxForms.zip)
-An example is provided (DemoAspxFormsWorkflowFinal.zip)
The current version requires VS2008.
I'm currently evaluating VS2010 & Sharepoint tools to provide more features.