I have just updated the list after receiving word the new version is out and the build numbers are known for vSphere 4 and vCenter Server. So I compiled a list of build numbers and updates from the patch notes for VMware ESX and VMware vCenter Server.
vCenter Server 4.0 Update 1 | 19 Nov 2009 | Build 208156
vCenter Server 4.0 | 05 May 2009 | Build 162902
VirtualCenter 2.5 Server Update 5 | 10 Jul 2009 | Build 174791 (English version)
VirtualCenter 2.5 Server Update 4 | 23 Feb 2009 | Build 147633 (English version)
VirtualCenter 2.5 Server Update 3 | 03 Oct 2008 | Build 119598 (English version)
VirtualCenter 2.5 Server Update 2 | 25 July 2008 | Build 104217 (English version)
VirtualCenter 2.5 Server Update 1 | 10 Apr 2008 | Build 84767 (English version)
VirtualCenter 2.5 Server | 10 Dec 2007 | Build 64201
VMware ESX Server 4.0 Update 1 | 19 Nov 2009 | Build 208167
VMware ESX Server 4.0 | 21 May 2009 | Build 164009
VMware ESX Server 3.5 Update 5 | 03 Dec 2009 | Build 207095
VMware ESX Server 3.5 Update 4 | 30 Mar 2009 | Build 153875
VMware ESX Server 3.5 Update 3 | 06 Nov 2008 | Build 123630
VMware ESX Server 3.5 Update 2 | 13 Aug 2008 | Build 110268
VMware ESX Server 3.5 Update 1 | 10 Apr 2008 | Build 82663
VMware ESX Server 3.5 | 20 Feb 2008 | Build 64607
Hope it helps out for easy reference.
Updated: 19 November 2009