herceptin after chemo

one question: my mom was diagnosed with b/c, stage IIb, 8 nodes +, er/pr+, her2neu+, grade 3 last year. she finished 4 a/c, 4 taxol last november. i was wondering if anyone has seen anything or can give some advice as to whether or not she would benefit from getting herceptin now, or if there is even a trial she could get into. she is only her2neu+, but she had so many nodes + and such a high grade. or have you heard anything else that has been helpful in similar cases?
she is going for her yearly scans and meet with the onc. this thursday (my birthday).
thanks in advance.