It's only been a couple of months since Spotify kicked off its invite-only beta here in the US , but along with announcing new Facebook tie-ins it's finally ready to let the masses into the party. As if lifting the velvet rope weren't enough, Spotify has also seen fit to throw in unlimited streaming for six months on the free plan, instead of the usual ten hours. Click the source link below to grab your own account now (Facebook account required) but be warned: millions before you walked in for the free taste and ended up with a $10 / month premium service musical addiction.