Eric Scouten, of the Lightroom team, blogs, takes photos and tweets about Lightroom. Last year he wrote an article explaining his workflow methodology with Lightroom. He has just updated this with the new 2009 edition, and his workflow has changed quite radically.
I really like the idea of an Incubator Catalog, and one I tend to use when away on shoots. Some of the deeper aspects are probably more down to how you shoot and won’t be to all tastes, but it is well worth a read.