Last update on the Dell Optiplex saga. The USB and sound card are fully functional. Actually, it was rather trivial getting them working correctly. I still have not updated the Evolution and Mozilla packages to their latest versions.
Nonetheless, the user has been quite productive and is able to use the huge assortment of Linux software without relying on any Microsoft products.
I plan to setup desktop sharing via the KDE desktop, so that I can assist her without having to drive 20 minutes to their home.
All that remains is teaching her some of the nuances of the applications and desktop tools.
Had lots of fun rebuilding her box. Learned a great deal in the process too.