I've included an attachement that shows the layout of this "idea".

1. Basically dropdown1 feeds dropdown2.
2. Dropdown2 feeds A and B
3. A is fed a map and is overlaid with points which for each point, B has an entry for.
4. Clicking on the link in B will center the map for that specific point in A (Google map-ish). This will also show a description of the point/link in C.
5. Clicking on the point in A will highlight the link in B and show a description in C.
6. The description in C will also contain a link to a video that should popup and play.

I've started to look at Flash and Ajax. I initially thought that server side would enable me to do all of this. But the scrollable map thing, seems will require alot more effort on my side.

I think that the audience for this project automatically targets folks with disabilities. So, I want to make sure I get this right on that end.