Every time that you download a new song on iTunes using your MacBook, you have to then sync your playlist with your iPhone if you want to have that song with you on the road. That’s the old way of doing things. mSpot changes how you get music on your iPhone, because it pushes your iTunes collection into the cloud.

The entertainment provider announced today that the iPhone version of its cloud music service is now available. In essence, it takes your iTunes music, stuffs it into the mSpot cloud, and grants you access to that music anywhere you have the mSpot app. This works on both your desktop browser, as well as your iPhone, iPad, iPod touch, and Internet-connected TV. mSpot launched on Android earlier this year.

You’ll still need to upload the music from your iTunes-connected computer to the mSpot cloud, but it does mean that you can access that music anywhere you can latch onto the interwebz. The catch is that the free version of the service limits you to just 2GB of storage (about 1600 songs). You can step up to 40GB for $3.99 a month.

Be forewarned, though. If you don’t have an unlimited (or near unlimited) wireless data plan, you can quite easily go over your monthly allotment with all this music streaming. Interestingly, there is even an airplane mode that will play cached songs on your iPhone without network coverage… but you need to download that cache first, of course.

[mSpot, iTunes]