Ryan,
I know this thread is dormant, but I recently used this workflow in the field and wanted to add that the EX1’s software is compatible with the intel based macs. You can certainly download and store the files on the powerbook g4, but in order for me to view my video in the field, I downloaded the VLC Media Player (free). Far from perfect, but I could check the video and the client could spot check.
The card reader works great.