I only have experience with dogs delivering, but based on the yesterday's pics compared to today's, I'd say you are going to have a baby soon!
I havn't read the whole thread (sorry) to know, but... have you been monitoring her temp? Most mammals experience a slightly increased temp when they are nearing delivery. I think with dogs it is like, 2-4* difference... I'd imagine something similar happens with horses, too? I dunno... Good luck! Excited to see baaaabeeeehhhhh pics!