apt-get new package management capability

[T o n g <mlist4suntong@yahoo.com>]

Hi, 

I remember seeing that apt-get can do orphan packages automatic removal
now. Does it need special setup? 

Package installed in my long-overhauled Debian was by debfoster, then
aptitude. Can I just use apt-get for automatic packages clean up now?
How can I transfer the "knowledge" from debfoster/aptitude to apt?

Can anyone show me steps in managing package only by apt-get, or
point me to the right web page? 

thanks

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