quick AJAX gig with iFrame communication...

My company needs a quick prototype built of a system that will open  
two frames in a page:

* Frame 1-- This will be the assistant offering some advice tuned to  
the information in frame 2.
* Frame 2-- A tool that will browse the web freely after beginning  
with a page filled with links of likely sites.

The user will begin by opening up this pair and then choosing some  
initial sites from a list of links shown in Frame 2. As the user  
chooses, frame 1 will adapt.

I would like some Javascript code from the main page to deliver the  
document.location information from Frame 2 to the Frame 1 so Frame 1  
can display useful information. The catch is that frame 2 will often  
display pages from domains that are different from frame 1. This  
complicates the development.

It would be ideal to do this with a minimal involvement from the  
websites displayed in Frame 2. If necessary, the sites in Frame 2 can  
execute some javascript on loading, but we would like to minimize and  
eliminate this requirement.

Please write with any questions and thoughts.

I imagine that this will be a short project for anyone with  
experience in building websites where the frames communicate with  
each other.

If you have the expertise and the time to knock off a quick  
prototype, please get in touch with your rate and any questions.

-Peter Wayner