A while back we told you all about using Twitter Hashtags. Well now we will show you one of the really cool and useful ways you can use them. There is a new hashtag entitled #song4comment where you can post your songs and get feedback from other users on it. Simply use any of the many ways to put your music on Twitter. I think this can be useful since many people often qualify and apologize for their song in advance before I give feedback. Now they have 140 characters to link it and get some feedback. You can always tag your song with a fake band name if you wish to remain anonymous.