When you're in the flow, surrounded by like minded artists, you're on a creative high, the world as expansive as the Santa Fe skies, as glorious as sunrise, as comforting as a puppy, as exciting as the blush of first love. That describes last week at a Solo Performance and Creativity Workshop, billed as the Ultimate Retreat. Led by the brilliant Ann Randolph (Squeezebox, Loveland) and Tanya Taylor Rubinstein, eleven intrepid creative souls from Maine to Texas, California and