Good question...but I think the Answer would be Yes..
Symantec is a product that is working on Windows
People wont stop using Windows 2000 just in a day.All across the world so many Critical Servers are still on Windows 2000. I have seen so many Banks Server on Windows 2000.
And you know the Change Management procedure in our Organizations.
So I think even for Win 2000 users they don't have to worry for atleast a year
But thats Purely my Opinion I guess Paul or somebody from Symantec can answer this question but whatever they say would be official.