It seem as a result of some work preformed by IST last night, AirBears clients in CITRIS are currently getting leases on the wrong subnet which renders them down. IST has been notified. The workaround would be to use one of the EECS WLANs.
UPDATE
[2009-04-29 10:04:10 | Fred A Archibald]
CITRIS is currently running on the Soda Hall AirBears feed. We will test the CITRIS feed again after hours.