[Vista unattended Guide]

Is there a mirror for the guide? The URLs in the OP no longer work and just re-direct to pop-up spam.

[EnableLUA pass - which is right, WSIM or the help?]

AndyE, You are correct and it will work on all 2008 R2 Versions, I do it daily .

    <settings pass="offlineServicing">
        <component name="Microsoft-Windows-LUA-Settings" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <EnableLUA>false</EnableLUA>
        </component>
    </settings>

Also if you want to do this in 2008 the Microsoft-Windows-LUA-Settings is not available as this is new to 2008 R2. You need to do the following.

		<component name="Microsoft-Windows-Deployment" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <RunSynchronous>
                <RunSynchronousCommand wcm:action="add">
                    <Order>1</Order>
                    <Path>cmd /c reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f</Path>
                    <Description>Disable EnableLUA</Description>
                </RunSynchronousCommand>
                <RunSynchronousCommand wcm:action="add">
                    <Order>2</Order>
                    <Path>cmd /c reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v ConsentPromptBehaviorAdmin /t REG_DWORD /d 0 /f</Path>
                    <Description>ConsentPromptBehaviorAdmin</Description>
                </RunSynchronousCommand>
            </RunSynchronous>
        </component>

[Creating Boot.wim w/NIC drivers for Server 2003 WDS Deployment]

Just a tip, if your running WDS on 2008 R2 and using the 2008 R2 boot image you can inject drivers just by right clicking on the Boot Image and choosing Add Driver. Gosh I love 2008 R2

[How to add Computer Description, Firewall (Enable/Disable), DNS Suffix]

To enable Remote Desktop

        <component name="Microsoft-Windows-TerminalServices-LocalSessionManager" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <fDenyTSConnections>false</fDenyTSConnections>
        </component>

To allow Remote Desktop through the Windows Firewall

<component name="Networking-MPSSVC-Svc" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <FirewallGroups>
                <FirewallGroup wcm:action="add" wcm:keyValue="RDP">
                    <Active>true</Active>
                    <Group>Remote Desktop</Group>
                    <Profile>all</Profile>
                </FirewallGroup>
            </FirewallGroups>
        </component>

I don't think you can specify Computer Description in the unattended XML, it might pull that the OEM Information or something. If its anywhere its probably in Microsoft-Winodws-Shell-Setup.

[KMS / MAK Product Keys in Autounattend.xml]

I specify our MAK or KMS keys in both the WinPE and Specialize passes, under Microsoft-Windows-Shell-Setup <ProductKey></ProductKey> and Microsoft-Windows-Setup <Key></Key>. Windows will automatically activate within a few days using the key provided during install.