Hashing passwords

Hi all,

This may well be a silly question but, with this recent hashed password leakage, I want to ask something about properly hashing.

The "manuals" say that we should create a salt and then hash it. But, since calculating an hash is a "relative simple" operation (in matter of processing power), is hashing two or three times the password (hash over hash) a "kind of" secure method or it is as weak as not using salt at all?

It can still be cracked but...

Sorry for the silly question, but I do prefer to ask than keeping a doubt.

Cheers,
--haZ
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