A must watch for anyone interested in the "politics" of steroids is Bigger, Faster, Stronger. I was looking for somewhere to purchase this (that I trust) in the UK but not much joy - although you can watch it all here:

http://video.google.com/videoplay?docid=-2670591054851050035

Makes interesting watching, and will be trying to get the other half to watch it too.

Here's the trailer:

And here's the exclusive trailer:

Searching YouTube there are also a couple of deleted scenes which relate more to the bodybuilding world (i.e. an interview with Jay Cutler talking about steroid use) as well:

Here is an interview with director Christopher Bell with IFC: