As demoed at KohaCon09, I have a new sysprefs editor in the works.
Anyone who is interested can see the code at http://github.com/pianohacker/koha/tree/prefs .
It is almost done, except for a few minor style issues, some missing sysprefs, and translation support. I hope to send out patches within the next couple of weeks.
Sincerely,
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Jesse Weaver