Word is spreading around Twitter that the serial rapist has been captured, but the SFPD press release is an error 404 page.  We'll update as more details come out.

UPDATE: It seems that SFPD has removed their press release from their website entirely, but Mission Local has some details:

Police said they arrested the suspect at 4:30 p.m. Friday at the Bernal Dwellings after receiving a tip from a resident. It’s unclear at this time whether the suspect lived there.

“I know it’s a huge relief for the community that he was apprehended,” Supervisor Scott Wiener said at a police conference Friday evening.

UPDATE II: Here's the press release from SFPD:

On January 6, 2012, at 4:30 PM, San Francisco Police arrested a 32 year-old male San Francisco resident in connection with three sexual assaults which occurred in San Francisco’s Mission District. He was taken into custody at Cesar Chavez and Treat Street by members of the Special Victims Unit and Mission Police Station.

During the first incident, which occurred on June 17, 2011, the female victim had been walking on South Van Ness between 24th and 25th Street when she was approached from behind by the suspect and bear hugged prior to being thrown to the ground. The victim was then dragged approximately 60 feet to an area between a vehicle and a residence where she was sexually assaulted and robbed of her property.

In the second incident which occurred on November 18, 2011, the female victim was also violently attacked from behind along the Mission District 24th Street corridor where she was sexually assaulted and robbed.

The third incident occurred on December 8, 2011 in the vicinity of 24th Street and Fair Oaks. In this incident, the female victim was sexually assaulted and robbed.

With the assistance of a tip from a citizen on the anonymous tip line, investigators from the Special Victims Unit were able to identify a person of interest. This person of interest was later connected to physical evidence located at the scene of the incidents.

The suspect was charged with numerous counts of sexual assault, kidnapping and robbery related to the three incidents.

The suspect’s name will be released at a later time due to pending identification matters.