Visualizing 100 Years of Ocean Shipping (2012)

Not to my knowledge, and I agree, that would be very interesting.

This is the closest alternative so far, but the heat map visualization approach is much less granular/doesn't do as much as could potentially done with the slavevoyages.org data: http://mcb226.github.io/SlaveTrade/

Yes. If you pause and click on any of the dots, you can also see details about that slave ship:

http://www.slate.com/articles/life/the_history_of_american_s...