So what are the big differences between the "old" ITIL (v2) and the new (v3)?

The former collection of topic-based structure of ITIL has been replaced by a core of practice and a complementary portfolio of supporting titles.
The former process-based model of ITIL has been replaced with a lifecycle model that contains the processes needed to manage services within a lifecycle stage structure.
The core practices of the Service Management life stages are then supported by more detailed complementary content specific to industry, stakeholder and practice topics. This makes the library more practical, easier to use and provides guidance specific to various stakeholder viewpoints to help gain further traction in ITSM.
ITILv3 moves beyond business and IT alignment to the integration and resulting eco system of business and IT.
ITILv3 has now been enhanced with guidance on strategies for outsourcing, co-sourcing, shared sourcing and guidance on selecting the right model and ow to make the decisions.
The addition of a state-of-the-art Service Management Knowledge Base that moves us from capturing data into transforming it into wisdom.
The addition of Service Portfolios and the use of value networks.
New processes including "Request Fulfillment" is now separate from Incident Management to be a process on its own.
The addition of functions such as Event Management have now been built into the incident lifecycle. Included is the art of creating service utilities, capabilities, resources and
warranties to deliver best of breed service management.
To enhance operational practice, areas of technical, operational and application management.
Organizational structures in each practice area have now been included to help readers
create solid foundations for Service Management (SM) practices. ITIL enhancements
also include interactive templates, business cases and procedures for building, assessing
and measuring eturns on investment (ROI).
New methods of delivering ITIL will continue to exist in books, CD and online
format, but the online subscriptions and collaboration spots from new vendors will offer a variety of exciting value added products and services (e.g. see