We can all agree that Lightroom is in desperate need of a more sophisticated watermarking feature. SeÃ¡n McCormack has posted an excellent tutorial today on his Lightroom Blog. He demonstrates how to use LR2/Mogrify to watermark your images and then bring those into a web gallery. Something you can't (but should be able to) do in Lightroom natively. Head on over and enjoy.
Thanks for the tip, SeÃ¡n!