Dial 555: A general purpose fan site with some (dated) columns and links to other sites.
HSJ.org: Offers FAQs, Movie Reviews, and Historical Data.
HSX Advice: Contains reviews, estimates, and regular commentaries about HSX.
Inargunzargun: Consists of some notes and comments about movies and topics regarding HSX, as well as a few links to other sites.
JHF's Movie Page: Mainly movie reviews, by an HSX fan.
The Hollywood Stock Brokerage and Resource: The Hollywood Stock Brokerage & Resource: A comprehensive fan site of The Hollywood Stock Exchange. Complete with experienced brokers, tips for newbies, and ABO/estimated delist charts.
The Trades: Has regularly updated columnists and many good links. They are also trying to put together an HSX fund.