Pulling out the USB drive after dd completes leads to corrupted/incomplete installation media if one forgets to flush the cached writes with "sync". Explicitly mentioning the command will possibly avoid some future annoyances/confusion.
Fix dd-parameters to avoid writing byte-wise. If the drive actually is written bytewise depends, but I actually have seen that (or at least I think so).
Andrew,
Here is the submission of the document in the format you requested. I have cut out the areas that cover the normal installation process and focused primary on the USB install topic. Let me know what you think.
Thanks,
Alexander