to the best of my knowledge only the Keyspan Express does support wake 
from sleep. The hardware of the URM-15T appears to be identical to the 
late Digital Media Remote receivers (which did not support wake from 
sleep). Since I could never get my hands on a URM-15T here in Germany, 
though, I can't tell for sure. It might be a different revision and 
might be supporting wake from sleep, but I personally don't believe 
so. Keyspan wants to sell the Express bundle, too, after all.

If you go for the Remote for iTunes bundle, please make sure you can 
return it and please share your experience here on the forum.

Best regards, 
Felix Schwarz