How can I transfer MiniDV tapes from my Canon XL1S to my computer without a FireWire port?

To transfer MiniDV tapes from your Canon XL1S to your computer without a FireWire port, you can use a USB capture device that supports analog video input. Connect the XL1S to the capture device using RCA or S-Video cables, then connect the capture device to your computer via USB. Use video capture software to record the playback from the tape as it plays on the camera. Alternatively, consider using a professional video capture service that can handle the transfer for you.