Done! In case anyone needs help filling out the Poloniex form, here are some of my inputs that might be useful:

Announcement page: https://bitcointalk.org/index.php?topic=1483957.0

Why you want the coin added to the exchange:
"STEEM is rapidly becoming more popular and is getting some serious daily volume through the various p2p exchanges trading it, as well as Bittrex."

Significant innovations over other coins:
"STEEM is the token for what is looking like one of the first "killer apps" in cryptocurrency. Steemit is a cryptocurrency-based social media platform, the censorship resistant crypto version of Reddit."