Tom Hogarty talks with Jim Goldstein about Lightroom 3 Beta.
Gene McCullagh has a fantastic introduction to Publish in Lightroom 3 Beta.
Mark Wilson has another take on it: Publishing to the Cloud.
Matt Kloskowski has some free Grain Presets on Lightroom Killer Tips.
Not directly a Lightroom post, but with useful information: Solving Printing issues with Snow Leopard, PSCS4 and Epson Printers.