I currently have a GV-D300 DV Walkman on the way, it has the standard firewire and analog inputs on it. I pretty much have it to capture with, but I'd like to know if I can use it as a interface to a production monitor. Like have

Computer>Firewire>Deck>Analog Video>Monitor

If that's possible. If you have any idea, let me know, thanks.

http://www.dvwonline.com/products/sony/gv-d300.html
For an idea of this device (I had no idea)

In theory that should indeed work. Most decks (and DV camera's)
support such a chain and is how most people get a signal out
to a TV or (broadcast) monitor.

Whether or not this exact model supports it is a different question,
but you'll find that out soon enough.