Definitely some POSITIVE udder changes! Less wrinkling and much fuller. Also, baby is much better lined up, still a little out to the left -- I just love the lopsidedness of a pregnant belly!! And I love the lacing on her back!
She is moving ahead beautifully, and I can't wait to see her elongation picture. We'll be looking for elongation, puffiness, the relaxed look of it -- some mares even have the vulva look slightly open. You could start checking for color just inside the lips. The "inside" color is usually a salmon-type color, and as she nears delivery, you will see the inside start to look much more red.
Is she giving you any personality changes? She's moving ahead very nicely, and it's beginning to look like you're going to have to start checking her very regularly soon. All looking great!