Oosah, a photosharing site à la Flickr that plays nicely with the iPhone, has a neat little feature that lets you tap into “the cloud” for all your music needs. After signing up for the site, you then upload any time of media to its servers, here, music files. Then you connect to the site using your iPhone and can play back those music files, provided they’re not DRM’d.
Of course, how well the songs play depends entirely upon your iPhone’s connection.
And now all we have to do is wait for an injunction to be filed against Oosah. You just know the RIAA will hate this service.