Hi Marie,
I am so sorry for the terrible news. I send my warm thoughts to you and the Mighty Oak. I took the liberty of doing some quick research on clinical trials for treating brain metastases from breast cancer. Links to a few that looked promising are set forth below. Most are in Massachussetts, with one at Dana Farber and another at Tufts. My guess is that you live in Mass. since you mentioned seeing a Dana Farber oncologist. The other one is at UCSF in San Francisco, where I am being treated.
Other obvious treatment ideas are Tykerb and Xeloda, if the Mighty Oak hasn't tried them.
Take care of yourself.
Best,
Jill
http://www.clinicaltrials.gov/ct2/sh...astases&rank=4
http://www.clinicaltrials.gov/ct2/sh...stases&rank=15
http://www.clinicaltrials.gov/ct2/sh...stases&rank=20
http://www.clinicaltrials.gov/ct2/sh...stases&rank=42