Forum Moderators: not2easy
You might consider grouping your articles in theme folders, e.g., widgets.com/restoring/, /buying/, /selling/, etc.
You are likely to experience a falloff in traffic at least temporarily.
If the proper redirects (301) are implemented, there shouldn't be any drop off. But make sure to not do unnecessary directories. The deeper your directory structure the higher your PR will need to be in order for them to be crawled.
For example you don't want to have...
www.xyzexample.com/content/articles/widgets/blue/