Check out Nick Nolte's blog. He did a nice write-up on using Lightroom with a couple plugins to stamp your images with the date and location using your GPS logs:
http://www.nicknoltewx.com/blog/201...om-lightroom-stamped-with-geotag-information/
Your name, date, and location are the most important pieces of information I'd put on the image. If you're going from a photography angle, adding the focal length, shutter, aperture, and ISO on there is a good idea too. Lightroom is pretty slick, letting you organize and filter your photo collections by all of these categories (and a lot more) as well making processing a snap. Instead of stamping the image, you could also use a web gallery that displays this information alongside the photo by pulling it from the EXIF data in the image.