The ReadMe says:
1. Copy the file "MAL Conduit" to /Library/Application Support/Palm HotSync/Conduits
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Well, you can find that in the package contents for "MAL Conduit.bundle" but it won't do the job.
Just copy the MAL Conduit.bundle to the folder listed and you'll be a happy AvantGo user.
Thanks to Tom Brown for developing this great conduit.
MAL Conduit
sync your Palm with AvantGo
Version: 1.0.4