Unfortunately someone would raise a privacy stink just like they did for the netflix prize data and the aol search data. This is why we can't have nice things.
I don't remember the robots.txt rules for sure, but doesn't that mean they don't allow crawlers at all?
That is the most insightful thing I've read today.
You can't write a simple scraper that is not distributed in 100 of machines across the web to pull out their data.
Actually I just noticed you get 750h of free micro instance time from aws... I wonder if it would be worth doing. I imagine the link+tags are <100GB in total.