[djheir]

This may or may not be in line with what you're looking for but two solutions come to mind. One is Orb which provides you access to any file on your pc. Streaming through there is pretty straightforward but it's probably not as finger-friendly a solution as your looking for since it's web-based. Second is a program I just downloaded called Didiom. Very similar in that it provides access to your songs (you install program on pc and tell it which folders to monitor) and allows you to stream songs. This one is definitely prettier and in my experience provides a quicker way to get to a song you want but I still love Orb cause you have the option to actually download the song to your phone and you don't need to install any software on your phone to access your stuff (you can access it from any web browser).

Hope this helps. Let me know if you want more info on either.