Arlene Piarulli (Crema, Italy) just finished the Master in Mosaic course at Orsoni Smalti Venezia. This is her masterpiece. I love the big, bold red pieces of smalti in contrast with the smaller floral pattern. It's great to see a mosaic which is fun - most pieces (including all of mine) are way too serious.
Yulia Hanansen (Ann Arbor, Michigan) is in my pantheon of mosaic gods and goddesses. She is a true master with stained glass, and her mosaics are infinitely more impressive when seen in person than through a photograph. This is a southern oak tree with Spanish moss hanging from it. Its size is impressive - 3' x 4' - and it was recently installed above a jacuzzi.