Sometimes people confuse the concept of wiki and blog.
A blog is a journal that is usually contributed to by one person or a small collection and others can then leave comments about the entries.
A wiki is collaborated on by any number of people.

Businesses are catching on to the power of collaborative publishing and using wikis more and more for their intranets allowing staff to build the intranet and knowledge management systems. It is hard to contain the excitement that such a tool gives me!
How often have I seen the problem of one person or a select few holding volumes of corporate knowledge that is difficult to share with newer staff members. You can’t just sit a new person down and fill them with many years of accumulated knowledge and expect them to have any level of understanding similar.
You can however encourage staff to build a knowledge system.
Anyone needing this information then has a way to ‘find it’ even if the originator of that information has left.
I have seen prosperous companies go on a huge decline simply through the loss of corporate memory - the leaving of long-term staff.
Policy and procedure manuals are often seen as dull on their own and though many companies have them, they are often for the purpose of passing an audit and often not really used.
A wiki can provide an interactive manual and one beauty is that anyone can update the manual when needed and everyone immediately has the latest information. Yes this is true of the staff intranet, but if you are relying on a select few staff with the web design skills and software, or on an outside contractor there is not enough momentum.
If staff can update with little technical skill, and the result is immediate, then momentum can be easily initiated and we all know that momentum is easier to maintain once it has taken off.
Wiki’s can be hosted either by a wiki provider, or on your own server.
For example the server I use here includes Fantastico (and what a perfect name!) which includes the ability to host your own wiki, just like I host this blog.
Go WIKI
How to Wiki - a huge compendium of ‘how to information’ in a wiki
Wiki spaces - a great free wiki host
Wiki Wiki Web - the first wiki
And of course I couldn’t leave out Wikipedias say so on the wiki
