It is a good suggestion Seamus, but we are limited to the functionality that our bulletin board software provides, and it doesn't allow for the kind of thumbs up/down/neutral buttons to be automatically added.
There is a "Add a poll" option available when you create a topic, although I am not sure if this is ONLY available to Admin users or generally available to everyone. Have a look for it when you next create a post. It should look like the attachment below
If it works, it adds a poll to the top of the post which people can (optionally) vote on, so you could create one each time you add a song with Like, Dislike, Neutral options available. This doesn't guarantee that people WILL vote, but it would give them the ability to.
I've already replied to you on that topic before Seamus.
We have a payment mechanism via Paypal. That will have to do.
I dont believe we will miss out on many donations for want of a bitcoin mechanism, though in individual cases that might be true.