What software do you use for photos?

So I am home from CMSExpo and I am trying to go through photos. I’ve finally (I think) given up on Windows Live Photo Gallery, as my library of 543 GB of photos (146k files).

I downloaded Adobe’s Lightroom 3 for a 30 day trial to see how it works. Anyone have any opinions on how best to manage all your photos for processing?

I sort my photos on the file system by year/month/date (into folders for each). Fortunately for me I also tend to remember when an event occurred, so finding photos comes fairly easily because of this.