This is a publisher I've been keeping an eye on since I missed their last YA short anthology call (darn it!) and the good news is, this one is open until September 1, 2012!
Here are the details from their web site announcement (read it here):
We are looking for short story submissions for our steampunk YA anthology Real Girls Don’t Rust.
If your short story is between 5500 and 7500 words and fits into the genre of YA steampunk, we want to read it!
Good luck and happy writing!
Megan