http://en.wikipedia.org/wiki/Digital_Rights_Managment
This is the wikipedia page on DRM. It answers well the question of why DRM is a problem today, as well as other issues. It provides a very comprehensive look at the issue. Wikipedia is funded by donations and is a non-profit agency. Wikipedia's greatest asset is also its greatest weakness, however. Anybody can go on to Wikipedia and enter content. This promises that both sides of the issue will be well represented. However, this also means that not all of the content can be trusted 100% of the time. As a result, this ensures that Wikipedia is not to be considered a scholarly source.
http://epic.org/privacy/drm
This site is run by the Electronic Privacy Information Center (EPIC) in Washington D.C. It is a public interest research institute devoted to technology and potential privacy issues. This site is also supported by donations. Unfortunately, the last time the site was updated was in 2004, making the content less than new. This site does give a more two-sided look at the issue, providing arguments for both sides (We need DRM to protect copyright holders, versus DRM is a violation of our 1st amendment and basic privacy privileges). This is a great site, but it is missing current information! There have been a great number of developments even in the past year. However, a quick Google search will reveal the major events in the DRM world over the past year.