I know I'm a little late with this, but Playbill Radio is playing the original cast recording for the Little Mermaid tonight to celebrate opening night. It's only available right now at http://www.playbillradio.com/, and they're already to act two. Lyrics are located at http://www.playbill.com/mermaid.asp.
EDIT: The broadcast can be downloaded from here: http://throughchange.blogspot.com/.
EDIT: The broadcast can be downloaded from here: http://throughchange.blogspot.com/.