I use SUS running on a W2k3 box at work, of course this is only available on a Win2k or 2k3 server... (This demonstrating M$'s commitment to security?

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OK, SUS allows you to approve updates prior to deployment.. SME can't do this, and I am a lazy admin, so I just tick them all anyway.
What SUS does allow is the ability to approve updated versions of patches (or to approve updates to existing patches automatically). Will this cache more recent versions, or continue to dish out old versions of patches?