Linlin, Your suggestion/question dovetails with three of the projects I have been attempting to organize over the last few months, namely using sasCommunity.org as the vehicle for placing forum, SAS-L and SGF links to documentation, exemplary papers and posts for every SAS function, statement, and proc.
An example can be found at: http://www.sascommunity.org/wiki/Include_statement_reference_notes
The reason I recommend that approach is to enable the effort to be accomplished and accessed by multiple people. I haven't publicized the project, as yet, because I'm working with the sasCommunity executive board to determine the best way to organize the effort.
That project is close, but tied to SAS statements rather than problem statements. A slightly different but related approach, using the same vehicle, is the way I attempted to organize a SAS-L thread to which people spent a number of years contributing tips. The link to that effort can be found at: http://www.sascommunity.org/wiki/Index_to_SAS-L_Chance_to_Make_SAS-L_History_Posts
HTH,
Art
