Upload your own collection

As your collection is lacking (and for some reason music is dissappearing), why not let us upload our own music?

The age of cloud computing is on us, and a big reason to why I want Spotify to be my one and only source of music is because then I do not have to go through all the pain-staking processes it takes to move and sync my music between my devices. Some of my devices do not even have the capacity to store music (e.g. my Asus Eee).

And let's face it, even though you get to the point where you have 95% of the world's music, there's always going to be a few albums your missing, due to licencing or just that you aren't well enough known. There's always going to be bands that aren't letting you touch their music.

This could perhaps be solved by letting us (Premium users) upload parts of our own collection to you, supplementing what you offer with what you don't offer. This music would, of course, be tied to the account adn only be playable by the owner of the account.

I see a lot of people want to be able to play their local collection with Spotify, this suggestion ups the ante a bit;)
But it makes more sense, I believe.

Keep up the good work!