Guy doesn't know what he is talking about.
See http://chargen.matasano.com/chargen/2007/9/7/enough-with-the... and http://codahale.com/how-to-safely-store-a-password/
See http://chargen.matasano.com/chargen/2007/9/7/enough-with-the... and http://codahale.com/how-to-safely-store-a-password/
Listen up: rainbow tables CAN BE and ARE of a concern if you run a website, because unless you use a salt, anybody who has access to your database can (speaking figuratively) rainbow-table it straight into their bank account.
Stop thinking about JUST web pages and password fields. That is a mistake some banks and other corporations made, and their databases are now -- remember? -- available for download online.