Calling All A/V Geeks

The following items are at my house: television, ibook laptop, good stereo speakers, subwoofer.

The following items, I lack: DVD player, receiver.

Is it possible, dear lovely A/V geeks, to use my ibook as a receiver so that all of those components could be tied together in one glorious system?

Barring that, is it possible to, at the very least, connect the speakers and subwoofer to the ibook?

Questions like this illustrate why I need a boyfriend. Men are good at resolving things like that. And they're useful for reaching items on far-up shelves.