Latest awesome use for Spotify for me, iPhone jukebox in the kitchen via the Spotify iPhone app.
I like to do a bit of cooking at the weekend and therefore spend a few hours in the kitchen, and one must have tunes whilst one cooks. We've got an old AIWA midi hi-fi system in there (twin tape, radio, 3-CD changer, you remember the type of thing), which up to now I've manually fed CDs into, which is a total fucking pain in the arse as it's sat on top of the fridge-freezer. It was bad enough with the old fridge-freezer (quite high up you see), but we got a new fridge-freezer a few weeks ago which is comfortably taller than me, so changing the CDs now is a 'stand on a chair' sort of arrangement - hence I always just end up listening to the same CDs as I can't be arsed to change them.
The hi-fi has an AUX-in via two phono sockets so I was toying with the idea of getting a netbook or cheap laptop to connect up via a 3.5mm jack to two phono plugs, to stream music either from the NAS or Spotify.
However, it then occurred to me that I already have Spotify in iPhone form, and of course the iPhone has a 3.5mm socket on it, so I dug out an old lead from a box I've never fully unpacked since we moved here over three years ago, and connected the iPhone up.
Et voila! Pretty much all the music in the world is just a couple of taps away, the iPhone uses the wireless in the house so response is really quick, never had any problems with stuttering or buffering - just excellent tunes aplenty as I cook. It uses all my same favourites and playlists from the desktop app (I guess all that stuff is out in the 'cloud'), sound quality is excellent (indiscernible from a CD), and no more faffing about with CDs.
It's actually easier and more convenient than streaming from the NAS would be, and I don't have to have a netbook or laptop in the kitchen either.
For the money, Spotify Premium is absolutely a total no-brainer in my book - wouldn't be without it now.