This is a very good topic, I think, because we're facing this situation now. I've been at my current location for a very long time. When I started there we set up a shared folder on a Windows server where we put everything. Back in the day, that worked out well, everyone could find documentation and it was great. However, that was well over 10 years ago, and as time has passed new people that have come on board just don't get the idea of going to this shared folder to look for documentation; and this includes new developers who've been hired the last 5 years. (I don't get why looking on a shared folder is so hard to understand, but believe me, it appears to me true.) But also, as time has gone by different documents have gone into different sub-folders, etc. I think it's become something of a mess.

So I've been thinking very seriously of SharePoint, at least at this point as a document repository. I'm very interestd to see how this discussion works out, because I'd like to see how it's worked for other people.