Duotrope has just issued a statement
For all those writers out there who are seeking publication and rely on Duotrope
to find their publication venues, heads up: on January 1, 2013, the site will require you to buy a paid subscription in order to access the majority of their features
The subscriptions are $5 per month, or $50 for a full year. Those who do not subscribe will not be able to search, look at submission deadlines, or use the submissions tracker. You will be able to see a limited profile for the various publications listed there, but not the acceptance/rejection statistics.The Found Poetry Review
has started a petition
asking Duotrope to consider having the listed publishers pay fees as opposed to the users.