windowsforms.net has a quick pictoral explanation of new features in Windows Forms 2.0, including:
Controls
WebBrowser
ToolStrip
SoundPlayer
DataGridView
SplitContainer
MaskedTextBox
Designer
ToolStrip Designer
Smart Tags
Document Outline
Snaplines
Runtime
ClickOnce
Windows XP Visual Style Support
Client Configuration
Improved Data Support
Layout
Here's a
great post by MVP
Rick Strahl on how to client-side callbacks (Ajax) using the built in features of ASP.NET 2.0. Looks like more plumbing and glue are needed for it to succeed in a large project.