I would like to hear the same thing. I've been capturing my bits of code in different named modules for years, in both Access and Excel. It works, but I don't have a good naming convention for the modules, tending to group them by function (basChart, basUser, basSortFind, etc). When I'm putting together forum answers, I'll create a separate spreadsheet (or database) with an appropriate function name, but again my convention is not solid.
If you look at Chip Pearson's web site, it appears he tends to do something similar, grouping by his code by topic: http://www.cpearson.com/Excel/Topic.aspx
Since so much code references different functions, it would probably be good to have more of a database of code, with metadata for easy cross reference. Of course, it also helps to have a platform and valid data to demonstrate the code in use.
Good question, does someone have a good standard to discuss?