Why does my FCE export to DV take forever?
I figured out why it was taking so long. The reason was because I store all my video on an external USB drive. When I exported it, I exported it to that external USB drive. To fix the problem, I exported from the external USB drive to the internal drive.

Update: I also found out that I need to render all my video first, then export it. This dropped the export time from days down to 20-45 minutes. One of my other problems was that I needed to make sure my footage was in the Apple Intermediate Codec format. Then, FCE doesn't have to bend over backwards to accommodate an "unsupported" format.