If you have a route to get a new biopsy, might be helpful. Either for chemosensitivity test or just the typical Her2 ER/PR stuff. Could open up hormonal avenues.
Cyclophosphamide/Cytoxan hasn't been explored. Abraxane has been shown to work after Taxol.
And there is the often overlooked Pemetrexed:
http://her2support.org/vbulletin/showthread.php?t=44488