You can now download Adobe Lightroom Beta 3, which is free to all users during the beta period. The Lightroom team has re-written much of the product to make it faster and to improve Raw file rendering--particularly sharpening and noise reduction. They've also added support for direct export to Flickr and the ability to export slideshows among many other user requested features. You can download it from Adobe Labs.Keep in mind this is only a beta so many functions are not yet complete. From the Adobe Announcement:Some of the new features included for you to play with in the Lightroom 3
beta are:

• Brand new performance architecture, building for the future
  of growing image libraries
• State-of-the-art noise reduction to help you perfect your
  high ISO shots
• Watermarking tool that helps you customize and protect your
  images with ease
• Portable sharable slideshows with audio—designed to give
  you more flexibility and impact on how you choose to share your images, you can
  now save and export your slideshows as videos and include audio
• Flexible customizable print package creation so your print
  package layouts are all your own
• Film grain simulation tool for enhancing
  your images to look as gritty as you want
• New import handling designed to make importing streamlined
  and easy
• More flexible online publishing options so you can post
  your images online to certain online photo sharing sites directly from inside
  Lightroom 3 beta (may require third-party plug-ins)*

For more details on the new functionality in the Lightroom 3 beta:

• Watch 3 short
  videos about what’s new in the beta
• Read the blog post from the Lightroom team to learn about the vision
  behind the features included in the beta.
• Find helpful resources on the new NAPP Lightroom 3
  beta Resource Center.
• Read the release notes
  (PDF) for detailed information.