Is there a reason to upgrade from Windows Server Update Services (WSUS) 2.0 to 3.0?
I have a Windows 2003 Small Business Server currently running WSUS 2.0 serving 7 Windows XP client machines.
Is it worth it to upgrade? What are the benefits? Does it require re-configuring all the client machines?
Or should I just "leave well enough alone?"
I would upgrade immediately to WSUS 3.0 SP1. Microsoft has stopped supporting WSUS 2.0 SP1 as of April 30 according to the product page, which may mean they may stop allowing it to pull updates from Microsoft Update (which may have already occurred).
The client machines may see an update to their Automatic Updates client, but they shouldn't require reconfiguration.
3.0 has a nicer and much more responsive management console (Moves from web console to a management console extension). Certainly worth the upgrade.
Summary from the Microsoft TechNet:
New Administration Console