Dear Last.fm,
Thought I’d take just a moment to write up a feature request that’s been on my mind for about a year now. I am sure it will take some engineering, but I think the work would be a worthy evolution of your already excellent online music service. Please feel free to comment on this page if you have questions or want to announce it’s availability. 
Add “In My Playlists” Section To Track Pages
On track page, you can see that a song is already in your library and whether you’ve loved it. I think it’d be super-cool if track pages listed the playlists that I’ve already added the track to.
This addition would be useful for the following reasons (and I’m sure there are others):
- Instantly, I’ll know that I’ve added the track to at least one playlist.
- I’ll see that I’ve added it to a playlist that it really doesn’t fit into afterall.
- I won’t have to ask myself if I already add it to such-and-such playlist?
I’d be honored to test out such a feature. 