After 90 days of filing, you can get an interim EAD at a local office.
That was what I did a while back -- that time I could just walk in, explainthe situation and I almost immediately had the card issued.
These days, though, before visiting a local office, we need to make an app by using Inforpass or calling the CIS's 1-800 number (recently I received a RFE -- digital photo, signature, fingerprints -- for my EAD application and the notice said I had to make appintment by calling the CIS, which I did).