There's a wonderful article at skyscript about how Gauricus predicted the death of Henry II. It's in PDF, but you can find the intro page here:
http://www.skyscript.co.uk/gauricus.html
Skyscript in general has a lot of first-rate articles on it.
A very very good article on economic predictions (current) is in the second number of The Tradition Journal. It's five euros, donated to charity, and well worth the price if you're interested in predictive astrology. The article is called 'Credit Crunch, Boom Bust' and runs 30 pages or so. Find that one here:
http://www.thetraditionjournal.com/issue2.html
The magazine is also in PDF format.