For my extremely-local peeps:
The Alameda County Registrar of Voters is staying open till MIDNIGHT to recieve applications.
The public window is in the Courthouse in downtown Oakland at 12th and Oak.
AC ROV, like county offices (and some city clerk offices) offers "in-person absentee voting". AC ROV is often open the weekend or two before an election for the convenience of the public. Allow some time and bring a book or your Ipod if you do this because there is going to be a line, but not like the line on Tues/4.