Vodafone Ireland Facebook page, only they'd never tagged me in their announcement, so I only found out by accident.
Anyway, I emailed & tweeted (Jebus, how I hate that verb..) them, and my mystery prize arrived today!
It's a speaker dog that's supposed to dance to the music, LOL.. The plug's too big for my phone, though, and I dunno if it even has batteries as I can't find my screwdriver. So, it'll probably just join my other toys. Must think of a name for it..