As can be seen by clicking on the OPEN PETITIONS link above, there are only 2 options: All Petitions and Popular.
These pages display only petition titles and signature totals, unfortunately, making it impossible for us to quickly determine when each petition will expire. And since the commitment to answer every petition that acquires at least 25,000 signatures within 30 days is the unique attraction of this site, expiration dates are one of the most important items we need to consider.
After all, there are over 200 petitions scheduled to expire within the next 30 days as of the writing of this petition on November 21, 2012. With that many petitions, we obviously need a quick, convenient means of determining which ones are worth taking the time to read, research, and consider signing.