^ Yep. You can see the schedule for the coming week's theater performances here:
http://www.akb48.co.jp/information/theater.phpAnd here's the main schedule, where you can see the past couple of months:
http://www.akb48.co.jp/about/schedule/Team A is pink, Team K green, Team B blue, Team 4 yellow, and SDN48 grey. Bargain priced shows are in orange (Teams B and 4 only, as far as I can tell), and special concerts are maroon. Click on the date for specifics, such as which members are performing, since the senbatsu are often away doing other things. For example, Acchan did only two theater shows this past month: the AKB48 Theater 6th Anniversary show on the 8th and the Team A show on the 27th, but not the Team A show on the 21st.
STAGE48 has detailed info in English on how to apply for theater tickets:
http://stage48.net/forum/viewtopic.php?f=17&t=2765I've never managed to get a ticket to a theater show. The best I ever got was a cancel machi (waiting list) ticket back in February 2009.