If you've wanted to try a paid streaming music service but have been skittish about the costs, you now have as good an excuse as any to give it a try. Spotify has brought back its twice-per-year Premium offer, giving you three months of full service for 99 cents (£0.99 in the UK) if you sign up between now and June 30th. And yes, there's a deal if you gave up on Spotify and are considering coming back -- if you canceled Premium at any time before April 15th, you can get three months for $10.