While WLPG allows you to keep images in separate directories and even on separate drives at the highest level the directories merge. If you tag photos the tags will be shared across galleries and when you click on a tag it will return matches across all folders. If the tag matches across folders there’s no easy way to drill down into the folders. You’ll have to search through all the images that match the tag."

When I use WLPG, I can just click on a tag name, and then any folder name OR date tag, in order to narrow the search down. You can even Ctrl+click several months in order to just see photos matching your tag and those folders and dates.

It's almost like Boolean searching, in my opinion

edit: please disregard my previous comment; looks like tags didn't work quite as I'd like!

You can add new plug-ins by visiting http://blogs.msdn.com/pix/pages/Plug_2D00_ins.asp…. One of the most popular is the LiveUpload to Facebook – if you've done face tagging in your photos it will let you do a one-time association of your people tags with your Facebook friends and when you upload to Facebook they'll be auto-tagged in your Facebook album.

One thing to watch with this. WLPG saves the tags as XMP which, last time I checked iPhoto doesn't import. My workflow is to work in windows for tagging and then import into iPhoto for syncing to iPhone and other places.

The interesting thing is that if WLPG finds EXIF tags it will write both XMP and EXIF and you are all good for syncing with iPhoto, but if there are no tags, then it sticks to XMP .

Obviously as iPhoto doesn't store the tags in the photo, tagging there is not an option when you want to sync between multiple systems (I learned that the hard way!)

So in the end I use a program called iTag on Windows which saves the tags as both XMP and EXIF and all is good. I would much prefer to tag in iPhoto or WLPG but haven't found an easy cross platform solution for it.