Lastify is a great way to discover new bands and new music within Spotify by using the recommendations from your Last.fm profile and turning them into playlists. As a fan of both Last.fm and Spotify I immediately liked this website.
After entering your Last.fm username on Lastify’s website, a playlist is generated for you based on the artists that Last.fm recommends to you. After the playlist has been generated, you can subscribe to it in Spotify.
The playlist will be refreshed automatically every 24 hours. When you listen to tracks from your generated playlist from time to time, Last.fm will come up with new recommendations after a while, so over time the artists in your generated playlist will change.
I hope that Spotify will implement functionality like this and put it in their software. Until that moment comes, Lastify is a great tool I will surely keep on using.