I did not know Pastor Grega. But there's few enough of us ELCA lady pastors that you feel an affinity towards another one whether you know them or not. She was the first ELCA and first female chaplain at Valpraisio. All I really know of her is that she couldn't pray in public when the Missouri Lutheran president showed up to preach and that she was very gracious about it.
Chrystal over at Soul Munchies has some very nice reflections about Pastor Grega and her work at Valpraisio. And Pretty Good Lutherans has some information.
She, her family and friends and all the folks at Valpraisio are in my prayers.