Gallery: Day to Night at SXSW 2011

See also Violet Blue's report: SXSW Interactive 2011 and The Japan Crisis.

SolarPump's electronics charging station on the lawn across from the Austin Convention Center.

Costumes got attention for brands at the entrance of the Austin Convention Center.

A busy weekend day in the Main Hall.

Tables in the main hall are constantly occupied by multitasking attendees.

Every pillar is covered with posters, stickers and branded schwag designed to get attention.

Aerial view of the always-bustling Main Hall, afternoon.

Party RV with karaoke RVIP roams downtown at night; this year they picked up pranksters in wedding dresses, "The Brides of Austin."

The RVIP has many sponsorships.

The RVIP (RVIPLounge.com) ringmaster, Jonathan Grubb, outside the vehicle for a quick stop.

During the day, pigs were spotted on the backs of human birds.

A discarded high heel shoe remains from the previous night's Mardi Gras style revelry.

Google and ACLU teamed up for a "privacy party."

The tragedy in Japan led to the quick formation of "SXSW for Japan" found at helpsaveJapanatSXSW.com.

Japanese SXSW 2011 exhibitors set up a donation table for Red Cross donations (helpsaveJapanatSXSW.com).

Sunday night, the Google ACLU "privacy party" greeted attendees with dotrights information.

Google's free photo booth ("Photoboof") at the Google/ACLU party had Picnik software for customization.

The Google/ACLU "privacy party" had a 1980s theme with stylists on hand.

Party goers getting 1980s hair and makeup at the SXSW 2011 The Google/ACLU "privacy party."

Party goers getting 1980s hair and makeup at the SXSW 2011 The Google/ACLU "privacy party."

On the street, the SXSW "Mardi Gras" atmosphere manifests in curious ways.

On the street, the SXSW "Mardi Gras" atmosphere manifests in curious ways.

Lounges continue revelry the next day in front of the Convention Center complete with media policies.

The parking lot made into Foursquare's Pepsi Max Lot raised questions about commercialization and brand integrity.

Xtra Normal's presence brought smiles to many, but we can imagine what these two must be saying about SXSW 2011.

Sessions are routinely packed, such as Ariel Waldman's SpaceHack.org talk: Waldman fields questions after the presentation

See also Violet Blue's report: SXSW Interactive 2011 and The Japan Crisis.