Look 2000 is good but it's coming to a day were it is not good.
You want a server 2000 doesn't cut it get Windows Server 2003, or Windows Server 2003 R2 aka Server 2005.
You want a personal OS why get 2000, XP will not be discontinued yet and offers better compatability and support.
You want an OS to goof around with and test get Longhorn 4000 or 5000 series.
MS issues final software update for Win2K
Microsoft released a final update rollup for Windows 2000 on Tuesday (28 June) just two days before expiration of mainstream support of the still-widely-used operating system. The update contains every security patch issued since the release of Service Pack 4 and the end of April 2005 along with various non-security related software bug fixes.
The release is described as a consolidated update, rated than a service pack, and contains only a few items that have not already been issued as standalone fixes. Full details of the content of Update 1 for Windows 2000 SP4 - along with download instructions - can be found on Microsoft's website.
Win2000 is now officially dead. No .net2.0 no new updates no new software from 2006-2007 and up due to .net. I hope you are happy with using your discontinued Windows.