I made this little program, it tweets your currently playing track from Spotify to Twitter
I will be happy for all the feedback that I can get.
Project's official page @ http://alifanov.net/twNowplaying/
Page @ SoftPedia http://www.softpedia.com/get/Multimedia/Audio/Other-AUDIO-Tools/twNowplaying.shtml
Please note that this version requires .NET Framework 3.5
Later versions will add support for twittering your currently playing track from Last.fm and WMP