I would find this useful also. But to Dr_J - if you do this think carefully. The minute a website allows adding links, the spammers start making more bogus user registrations and start spamming with bogus posting planting their links to boost Google ranking. It is horrible. I was fighting this daily when I ran two open source projects on my self hosted site. Allowing links pointing inside the site is safe. The spammers want to point to websites selling all sorts of unserious things. It is all about Google rankings. They do not expect any users of the site to follow these links.
This falls under the umbrella of making the song description be rich text instead of plain text. That allows you to do formatting as well as links. It will happen at some point, but I've got more pressing features in the pipeline, so I beg your patience.
here is an idea: if you are logged in, you get the actual link. but if you are not logged in (such as robots (google included)) you just get the text of the link. i think robots would not pick that up. and if it's a human and they were interested, they could just cut and paste the link into the browser