You can try this: http://www.google.com/support/contactsync/bin/answer.py?hl=en&answer=92997
It's meant for syncing your itunes address book with Google address book. As for straight Mobilme to Android, you might try SMEStorage. It's able to read multiple formats and sync them.
This site may have the information you need, check it out... http://superuser.com/questions/2564/is-there-a-way-to-transfer-all-of-your-mobileme-contacts-to-goog...
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