Hint for the October Monthly Special

Trick or treat! October will have some great treats in store. For those who are new to the site, we focus on a new theme each month, and readers are encouraged to do a project related to that theme, post it on the internet (their blog, flickr, or other image site), and then link it back to the "Monthly Special" post. For more information, read the FAQ page on the right.
Guess what October's theme will be.