http://code.google.com/p/betex-ecosystem/source/browse/#svn/trunk/betex-ecosystem-marketdatacollector - Simple market data collector that stores data in the Apache CouchDB. It’s a command line application that allows collecting either one particular market every given number of seconds or all HR win/place/inplay/sp markets 10 minutes before market start time. The given data is collected: market prices, market traded volume, market details. Status: GOOD
http://code.google.com/p/betex-ecosystem/source/browse/#svn/trunk/betex-ecosystem-webconsole - Web application based on Google GWT that presents historical market data in a form of bio heat map. Status: POOR
More on my betting exchange research at http://blog.danmachine.com/