Ben Goldacre’s “Bad Science” article (Guardian, 20th September 2008) makes interesting reading:

Missing in action: the trials that did not make the news

Somewhere you can keep track of interesting trials is the Current Controlled Trials, and the World Health Organisation’s International Clinical Trials Registry Platform (ICTRP); DEC-net – Drug Evaulation in Children; ClinicalTrials.gov (trials in the US);