People also dressed up in costumes at work. Last year I just did a painted clown face (in honor of Dana), but this year passed it up. The IT department isn't filled with too creative a group - we may be good at code but are poor at personal interaction.
Most of the costumes were worn by people out on the floor, with the women doing most of the work. I deal a lot with the Presidential group - they take care of complaints sent to the president of the company - so spend time with them on their programs. Tara dressed up as a mermaid - cute outfit, but she had to pull it up to her knees to walk around. (Tara's not petite, she's close to 6' tall)