It’s a handy thing to do. I have a slightly different setup to do something similar.
I run a DLNA server (MinimServer) and BubbleUPnP Server on my DS1522+. The latter makes the DLNA server available over the Web to certain DLNA control points (in my case, BubbleUPnP).
With that setup, I can access my music library from anywhere that has Internet access. I can play the tracks on my phone or redirect them to any DLNA client (renderer). I’ve even played my own tracks on high-end equipment at audio dealerships (Naim Uniti) and friends’ houses (dCs Rossini, among others).