In fact, the first result (which is duplicated several times) is calling Songbird an 'iTunes killer' - quotes included - and mentions Seeqpod as one of the plugins, saying:
> it expands your library exponentially, assuming you’re down with the kind of quasi-legality involved
I'd forgotten all about Songbird. I kept coming back to that app but I never managed to stay. I always felt I should like much better than I actually did.
> it expands your library exponentially, assuming you’re down with the kind of quasi-legality involved