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[John Gilmore]

> Using a well-behaved olpc-update, minor updates should be really
> lightweight and low-risk to deploy.

The standard solution to that is called "package managers" - rpm in
your case.  Unfortunately its network version, yum, is really
heavyweight and too clumsy to run in many XOs.  Installing updates
with rpm, and fixing or rewriting yum to be low impact in XOs would be
much better for the community than continuing to evolve your own sui
generis tool.  Though it's much more fun to reinvent the wheel, the
subsequent maintenance load is substantial, as you're noticing.

	John