Some enterprising anonymous researcher has determined that almost 100,000 copyright infringement lawsuits have been filed in the U.S. in the past year:

In the United States the judicial system is currently being overloaded with new cases, but the scope of the issue was never really clear until now. An anonymous TorrentFreak reader has spent months compiling a complete overview of all the mass P2P lawsuits that have been filed in the US since the beginning of 2010, listing all the relevant case documents and people involved in a giant spreadsheet.

The research shows that between 8th January 2010 and 21st January 2011, a total of 99,924 individuals have been sued. The vast majority of the defendants have allegedly used BitTorrent to share copyrighted works but a few hundred ed2k users are also included.

Of the 80 cases that were filed originally, 68 are still active, with 70,914 defendants still in jeopardy.

The raw data is available is spreadsheet form over on Google Docs.

As the disparity between 80 and 70,914 indicates, these types of lawsuits completely overwhelm the courts.  The U.S. justice system is simply not set up to handle this kind of volume, especially for suits as notoriously tricky to argue as copyright infringement.