StrongMocha

Adobe did release the LightRoom 1.4.1 update. It is a fix to the borken 1.4 release which has been pulled off in March

According to Adobe and the Lightroom 1.4.1 Readme the following has been added or addressed:

UPDATE FOR LIGHTROOM 1.4:
Lightroom 1.4.1 includes corrections for the following issues:
(These issues are specific to the 1.4.1 update. Lightroom 1.4.1 also includes all of the previous updates listed for Lightroom
1.4 below)

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Version 2 of Lightroom is now available as a public beta.  Lightroom 1.0 customers can download and install Lightroom 2.0 beta for use throughout the beta program. The beta software expires on August 31, 2008. Read the release notes of Lightroom 2.0 beta

New Features
Library

• Streamlined Library Layout
• Smart Collections
• Powerful Filter Bar to search and refine images
• Suggested Keywords for simplified keywording
• 10k pixel size limit raised to 30k pixels
• Output-based Collections

Multiple Monitors:

• -Four flexible modes for an alternate window:  Grid, Loupe, Compare, Survey
  

Photoshop CS3 Integration:

• Open files in Photoshop as a Smart Object
• Select multiple images to merge as a Panorama
• Merge multiple exposures into a single Photoshop HDR image
• Load multiple files or virtual copies into Photoshop as separate layers in a single document.

Export Functionality:

• Auto-add exported images to the Lightroom catalog
• Auto Output Sharpening for images on export

Develop Module

• Non-Destructive Localized Correction for dodging and burning specific areas of an image
• Post Crop Vignette
• Basic Panel Keyboard Shortcuts
• Improved Auto Adjustment
• Improved memory handling through 64-bit support on OS X 10.5 and Vista 64-bit.(Not limited to develop module)

Print Module

• Picture Package for multi-page layouts
• Print Module output directly to JPEG
• Enhanced Print Sharpening based on PhotoKit Sharpener algorithms
• 16-bit Printing for Mac OS X 10.5

(Source: Lightroom Journal)

Lightroom 2 Video Tutorials:

Lightroom video tutorials by Julieanne Kost:  Lightroom 2 beta Tutorial Part I and Lightroom 2 beta Tutorial Part III.