In case you haven’t already read it elsewhere, Adobe have announced the Lightroom 3 BETA. You can read more and get a copy at http://labs.adobe.com/technologies/lightroom3/
Warning - this is a beta so if you try it out, make sure you are playing with COPIES of your photos. Adobe released it for public feedback, including discovery of bugs.
Highlights in this first release:
Built with performance and image quality in mind
Improved noise reduction (seems to be colour noise only)
Improved import experience
More web publishing options (e.g. direct management of your flickr photostream)
Exportable slideshows, with audio
The previous betas have seen new features added to later releases, so I expect a few other things in the coming months.
I will be posting some more detailed information and thoughts on my blog over the next few days.
In the meantime, Tom Hogarty has started a list of resources on the Lightroom Journal.