Links: SharePoint V3: Search: Planning

Plan search (Office SharePoint Server)
http://technet2.microsoft.com/Office/en-us/library/e8c0fccd-8364-4352-8778-c9c46a668b701033.mspx

Plan for administrative and service accounts (Office SharePoint Server
http://technet2.microsoft.com/Office/en-us/library/f07768d4-ca37-447a-a056-1a67d93ef5401033.mspx?mfr=true

MOSS Search - Customer Proof of Concept Scoping and Typical Tasks
http://blogs.msdn.com/miketag/archive/2007/01/18/moss-search-customer-proof-of-concept-scoping-and-typical-tasks.aspx

SharePoint Deployment Capacity & Performance Planning 2003 & 2007
http://blogs.msdn.com/joelo/archive/2006/07/19/671789.aspx

Estimate performance and capacity requirements for search environments
http://technet2.microsoft.com/Office/en-us/library/5465aa2b-aec3-4b87-bce0-8601ff20615e1033.mspx?mfr=true

Estimate performance and capacity requirements for Internet environments (Office SharePoint Server)
http://technet2.microsoft.com/Office/en-us/library/45997bad-da15-4442-8727-78e0f2dc5a9c1033.mspx?mfr=true

Estimate MOSS Search Disk Space Requirements
http://blogs.msdn.com/miketag/archive/2007/07/05/estimate-moss-search-disk-space-requirements.aspx