You're right, a difference between my service and yours is the fact that you use Last.FM. I use The Echo Nest though, it's an amazing service. Tubalr uses The Echo Nest and builds playlists based on artists top tracks.
Tubalr used to use Last.fm but found out that the last.fm api went down a bit to much for my liking. After switching to The Echo Nest I've had 0 downtime due to the API I use.
Tubalr also creates "radios" in several ways. Check out the explore page(http://www.tubalr.com/explore). You can browse top genres, subreddits, and a huge list of genres.
As far as recommendations, type in an artist and click the similar button and you'll get a playlist full of artist similar to what you searched. (http://www.tubalr.com/similar/My+Morning+Jacket)
Tubalr used to use Last.fm but found out that the last.fm api went down a bit to much for my liking. After switching to The Echo Nest I've had 0 downtime due to the API I use.
Tubalr also creates "radios" in several ways. Check out the explore page(http://www.tubalr.com/explore). You can browse top genres, subreddits, and a huge list of genres.
As far as recommendations, type in an artist and click the similar button and you'll get a playlist full of artist similar to what you searched. (http://www.tubalr.com/similar/My+Morning+Jacket)
Example Genre Search: http://www.tubalr.com/just/indie+rock or http://www.tubalr.com/just/dubstep
Example Reddit Search: http://www.tubalr.com/r/metal or http://www.tubalr.com/r/realdubstep