There are some BankDirect options (www.bankdirect.com):

Mileage Money Market: 2.9% APY plus 1000 miles for a new account plus 50 miles per month per $1000 (so that would be 15,000 mile per year for $25K)

Mileage CD:

1000 miles/$1000 in 2 year (4.15% APY)
500 miles/$1000 in 1 year (3.65% APY)
250 miles/$1000 in 6 month (3.4% APY)

You could also get 4% APY in a non mileage MMA.