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One of my favorites for quickly copying a directory between hosts is...

dsthost# nc -l 1234 | tar -xvzf - -C .

srchost# tar -xzf - . | nc dsthost 1234

Heh, I used to use rsh (or was it rlogin?) for the same purpose back in the day, before rsync came along.

and we used to use ttcp (for it was more efficient with slinging around large files.)