Add option to pre-install lots of free software
There is an immense amount of quality and free software for Windows. I'm sure Dell has heard of OpenOffice and LibreOffice, but you can find a very extensive list of such software here:
Most of that software has been tested by members of the NBR forum (myself included).
My suggestion is that Dell offers to pre-install a good portion of this software. In many cases, the license agreements allow corporate use and distribution, as long as the original license file is also distributed. Applications which should be part of these choices include:
OpenOffice and LibreOffice
Web browsers: Chrome, Firefox and IE itself
Other possible options:
Windows Live Essentials
Codec packs like CCCP or K-Lite
Docks like ObjectDock
WinRAR and 7-zip
Resource monitors like CPU-Z, GPU-Z and the addgadget.com gadgets.
I understand that for many users, this tremendous amount of choice might be overwhelming. Dell could perhaps offer these on machines for power users only, like Alienware and perhaps Latitude and Precision. In any case, the most important is that the option for "I do not want any pre-installed software" is clearly marked.