Background Info
I am working on setting up a method for my company's developers to share documentation and information about our various internal systems. This would range from information that would be useful for bringing a new employee up to speed, to descriptions of common problems users have with the systems and their resolutions.
This seemed like an ideal job for a wiki to me, and since our company only has the ability to host ASP.NET applications, I set about researching the available ASP.NET wikis. ScrewTurn Wiki seemed to be the most appropriate one, it's very full-featured and there are several plugins available that would be useful for my situation, including syntax highlighting and AD integration.
However, upon starting the process to have ScrewTurn deployed to our intranet, it was suddenly remembered that, hey, Sharepoint 2007 has a wiki, and since we already have Sharepoint set up, couldn't we just use that? I did a bit of evaluation of the Sharepoint "wiki" (in quotes because it barely qualifies), and was able to demonstrate that it wouldn't be suitable due to its many deficiencies, which I won't list here.
Now at this point, it's been suggested that perhaps I don't need a wiki at all, couldn't we just do everything in Word documents and use Sharepoint's document management functionality instead?
The actual question
So what I'm looking for is some additional ammunition, preferably from people with experience. What are examples of things that will be difficult or impossible with Sharepoint in the context of internal developer documentation? What is a wiki better at? Hey, I'm open-minded, what is Sharepoint better at?
What will make it worthwhile to deploy a wiki instead of simply using what we already have?