We get so many of these threads that I've just (like in the past 20 minutes) created an open Facebook group where people can post pictures of horses that need names, or offer suggestions to people who have posted there. I think it could be a lot of fun but it only works if other people play join in.
I've started the group off with a post about the OTTB mare I found yesterday (drool) who needs a new show name bad! - Okay - were a few months out from any sort of show, but it's nice to plan ahead! Stop by, join, invite others. Help me name my horse.