After installing it and playing with the new version for a matter of minutes, I have noticed an increase in general speed and performance. But anyhow, here's the official list of whats new…
Whats New in Konfabulator 2.0 for users
Multi-Pane Preferences dialogs for Widgets
New Widgets
Improved Proxy support for web resources (AutoProxy)
Whats New in Konfabulator 2.0 for authors
COM support
Inter-Widget messaging
Image Tiling/Scaling
ClipRects on Images
vAlign on images and text areas
Colorization (colorize, hsl adjustment, hsl tinting)
Context menu addition support
filesystem.read/writeFile (utf-8 only)
filesystem.volumes array of currently mounted volumes
filesystem.move/copy
filesystem.getFileInfo
filesystem.getDisplayName
chooseFile/chooseFolder dialog functions
saveAs dialog function
chooseColor dialog function
Trash/Recycle Bin open/empty
Multiple Window support
Multi-Click handling
New Timer object
