Dave Sherohman [esper at sherohman.org] wrote:
> 2)  Use switches instead of hubs.  You can't sniff a packet that
> doesn't reach your NIC.

This is totally false. There are many ways to sniff a switched network. arp poisoning and arp-cache flooding are the two most common. Just check out ettercap or dsniff. 

http://ettercap.sourceforge.net/
http://www.monkey.org/~dugsong/dsniff/