Some of the bring centers have a collection point for resaleable cds/dvds for Oxfam. I don't know of any public collection points for burnt cds/dvds though.
The Dublin centres only accept resaleable CDs, see:
The fact that they have "CDs" as an option in the search would suggest that they have accepted them in the past, or perhaps that they just want to distinguish between those that they do and don't accept.
Thanks for all the replies guys. I should have said at the start the the CDs & DVDs are all ones I burnt myself and as such would have no resale value.