Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
And miles in one program can be redeemed on any of a number of partner carriers. UA miles, for example, can be redeemed on UA, US, or any other Star Alliance carrier. The same with US miles. But each program has its own redemption rates, fees, and rules.