Hey, head's up!
I'm putting together an unofficial tumblr for spine users to share their works and share tips and things. I'm going to be reblogging some of your stuff if that's okay with you.
I have a recommendation though: tumblr increased their file size limit quite some time ago so you don't need to host your gifs in dropbox, just upload them to tumblr directly.
gifs over 1MB used to be a problem but that's not the case anymore.