Just got done reading the making of ROTS book, and alot of little scenes have I found. Kidding aside, I no know where Shaak Ti dies. Obi Wan and Anakin come upon Shaak Ti standing in a hallway, with battle droids standing behind her, as if she is leading them. Suddenly, you see a cloak open and her lightsaber (along with two others in it) hanging there. You hear the power on sound and the blade rips through her back. Grevious is then revealed.

The Yoda on Dagobah scene was done digitally and was in the film as of the printing of that book.