Do small businesses need a wiki? Can they find value in a wiki? I think many of them can... (For those not in the know, a wiki is a web site which anyone (with permission) can edit.)
At 2XL Networks, we have an internal wiki which can only be accessed by us, and on that wiki is all the information we need about server configuration, our customers, our process, and anything else that people working in remote locations may need. John and I both work on laptops and desktop machines, so the wiki is an excellent way to have a central repository we can both access – and edit – as needed.
But do other companies need such things? I've introduced wikis to many companies over the years, and I've personally found them to be extremely useful when it comes to storing information you want easy access to. One of our customers has just started an internal wiki which keeps track of all the little details about their network, and product serial numbers, and client web sites.
Overall, wikis are a simple solution to put in place, and the value you can get out of them all depends on what you put into them.