Hi Dani et al.,
I don't know if you'll have any interest in this, but I'm going to describe what I have done over the past couple of years on an open source project that I think could be extremely beneficial to Daniweb as well.
The project I work on (VTK - the Visualization Toolkit) has a very active user mailing list. After following the list for a few months, I realize the same questions were being asked over and over again. Each time a question was asked, someone would spend a non trivial amount of time answering the question that had already been answered! I started a wiki page dedicated to posting the solutions to common problems and techniques:
After a lot of effort compiling this, almost every question can now be answered in a single line reply - a link to one of these wiki examples. When a question has not been seen before, it is my (or someone elses) job to get it into a standalone/compilable example and make a new wiki page for it.
This system has seemed to help us TREMENDOUSLY. Not only does it take a lot of effort out of answering the mailing list, it also is an excellent resource for new users to "self learn" our toolkit.
I am a follower of the c++ section of your site. I realize that while VTK only took about 500, c++ may take take (just a few :) ) more examples to exhaustively cover, but I imagine it would have the same type of impact.
I actually have a personal Examples/c++ folder with hundreds of c++ concepts wrapped up into < 20 line compilable examples. I don't know your vision for Daniweb, but I think if there was a wiki like this for every language it would be an invaluable resource.
After all this rambling - I found a site that is quite similar to what I was suggesting:
http://www.java2s.com/Code/Cpp/CatalogCpp.htm - The problem with this is that it is not community editable.
Please let me know what you think -