Below are my actual notes during the Migration Workshop session here at the SharePoint Conference. (Please forgive any wrong grammar. (It is like writings from the old age where the pen and exact document by famous people are kept in a museum).

Reference Models: Portal/Web Applications

WSS 2.0 Data Tier—SQL Server 2000—OOB Lists: Links, Announcements, Contacts, Events, Tasks, Issues—OOB List Applications: Threaded Discussion, Survery—OOB Libraries: Documents, Images, XML Forms—Custom and Customized Lists and Libraries

WSS V3 Infrastructure Tier—Server Farm Topology—Server Roles – Web Front-end (WFE) Server – Database Server
—Database Architecture—Configuration Database—Content Database—Improved, extensible admin UI—New Site Model

Reference Models: Content Model

OOB Content Type Hierarchy—Reference: Windows SharePoint Services V3 SDK

They now have multiple lists

Upgrade Strategies:

Upgrade Entire WS 2.0 Environment
In-place Upgrade Path
Site Collection by Site Collection
Gradual Upgrade Migration Path
Content DB Migration Path

Pre-Migration (All Migration Paths)

Upgrade farm to WSS V2 SPS required
http://www.microsoft.com/downloads
Install Pre-requisites: WinFX 3.0—ASP.NET 2.0—TIP: Test custom web parts with ASP.NET 2.0—Windows Workflow Foundation
Windows Server 2003 Non-R2/ASP.NET 2.0 Installations—This Windows SharePoint Services virtual server has not been configured for use with ASP.NET 2.0.50727.42. For more information, please refer to Knowledge Base

Pre-Migration
Run & test a full backup
Subdivide all large content databases—25-50 GB recommended by SQL Server and SharePoint Product Groups—MS IT standard for mximum content database size of 35 GB—Else upgrade/migration will take a long time

Look for the SPSite manager tool. Look for SharePoint Utility and Split Tool for Migration.

General Upgrade Migration Path:

Pre-Migration—Same as “Pre-Migration (All Migrtion Paths) earlier in this deck—Select initial WSS 2.0 site structure

Post-Migration—Common Issues and Best Practices—Automatically create databases—May be manually configured if necessary
—Need one 2007