AE is limited to a mini-toslink connection (optical) in order to stream digital. I've tried it and it is certainly convenient, but did not sound as good as going wired through a Waveterminal U24 to the same DAC (seemed to have better PRAT and a tad more resolving, especially at the extremes). If you want to go wireless you might check into other alternatives as well (Empirical Audio, Slim Devices, Olive, etc.) for superior results to an AE. Alternatively I believe there are a few companies upgrading the AE (Red Wine Audio is one). I have no experience with these specific products, but having tried the stock AE, I would look to those other solutions myself if I wanted to have the convenience of wireless. There are a great variety of USB/SPDIF converters as well as USB DACs (which simply to that conversion internally).
Marco
Marco