I'm sorry if this has been posted, or rumored recently. I'll vacate if it's old, I just don't have the time to do a search
http://newswire.ca/en/releases/archi.../27/c5829.html
FRANKFURT, Germany, Jan. 27 /CNW Telbec/ - Frequent flyers on the Star Alliance network can now also use their miles to upgrade when travelling on Air Canada, TAM and US Airways. These member carriers are now participating in the unique Star Alliance Upgrade Awards programme, the redemption option enabling customers to use miles or points from their Frequent Flyer Programme (FFP) accounts for one-class upgrades on scheduled flights operated by the participating Star Alliance member carriers.