Eligible voters have until one minute before midnight Pacific time on March 26 to submit nominations for the 2011 Hugo Awards. TheHugoAwards.org reminds everyone: 

Members of Renovation who joined by January 31, 2011, and members of Aussiecon 4, the 2010 Worldcon, are eligible to submit nominating ballots. All ballots must be received by Saturday, March 26, 2011, 11:59pm PDT.

Online nomination ballots are available here. More information about the Hugo Awards, including details about how to submit a nominating ballot, is available here.