SpotIn - Spotify Quick Search

https://market.android.com/details?id=com.kludgery.android.spotin

Want to play your discovered music in Spotify mobile? Got SoundHound? Hate typing and flipping back and forth between the apps? This app eliminates the need to do that. You can now share your tagged/discovered songs with Spotify using the SpotIn plugin. By sharing a song and selecting the SpotIn app it will connect Spotify with your discovered music.