I'm no expert, but the NW program, with improved opportunities for international upgrades and a full-benefits codeshare partner to OZ would be a really good start.
Also, and this is not really mile-specific but rather a more general wish, I would like to see a complete overhaul of the reservation/fare system. (Who wouldn't

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[This message has been edited by notsosmart (edited 04-06-2003).]