SeeqPod - Website

SeeqPod is a search engine for music that allows you to play the results through an embedded flash player. It recently has added video support, via YouTube. The files found do not have download links, however they can be downloaded if you use the Firefox extension Video DownloadHelper.

Pros & Cons
Pros:

•Play online mp3s using your web browser
•Access a huge library of music
•Create custom playlists
•Has both mp3s and videos
•Easy to use
•Firefox extension available
•You can download mp3s as files with an easy hack
•Cool "discover" button makes playlist based on similar artists

Cons:

•Can't copy and paste text from the interface (URLs for example)
•Somewhat clunky Flash interface
•Grey-area music copyright situation