Const ADS_PROPERTY_CLEAR = 1
Const ADS_PROPERTY_UPDATE = 2
Const ADS_PROPERTY_APPEND = 3
Const ADS_PROPERTY_DELETE = 4

‘Using PutEx to append addition values to multi-value attribute.
arrayValues(0) = CStr(3)
arrayValues(1) = CStr(4)
myObject.PutEx ADS_PROPERTY_APPEND, “myAttrib”, arrayValues

from: http://support.microsoft.com/kb/260251

So

objContainer.PutEx ADS_PROPERTY_APPEND, “member”, “CN=” & strUsername & “,” & strUserOU & “,” & strRootDSE   
objContainer.SetInfo

-spam fighter, *nix user
http://www.planetmike.com/

-reporting services tweaks
http://blogs.msdn.com/chrishays/default.aspx
and tutorials

Not blogs, but still good reference:

-VBscript including AD and Exchange
http://www.computerperformance.co.uk/Logon/Logon_CSVDE.htm

-Everything related to windows server
http://www.petri.co.il/planning-sites-services-architecture-windows-ad-exchange-2007-server.htm