The Discogs submitting community have broken records recently, by adding over 3000 releases to the database on Sunday the 27th January and Sunday the 17th February!
If 3000 releases per day were entered constantly, just over a million releases per year would be added to the music database.
As of today, submitters have added nearly three and three quarter million releases to the database, about two and three quarter million artists discographies, and four hundred and forty thousand labels. You can keep up with the current totals, as well as the new additions to the database, at http://www.discogs.com/explore
As a side note, it would take about 178 years to listen to all the records so far cataloged. Better get started!