You'll no longer be sitting beside that sexy marine biologist dressed up as a sea anemone wishing that you could have a research themed costume too.

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Finally, there is a combinatorics themed halloween costume!  Sport this beautiful Arduino and LED based rendition of Cool-lex combinations (research by Aaron Williams and Frank Ruskey), and show off your nerd times 2.

Here is the technical stuff on the combinations:

http://webhome.cs.uvic.ca/~ruskey/Publications/Coollex/Coollex.html

I used adafruit's LDP6803 LEDs.  There are tutorials on how to use them on that page.

Cool-lex LED lights connected to Arduino