I agree that Adobe does more, but Vista has the advantage of working with a 10′ interface that any Tom, **** and Harry can use. And it’s a heck of alot faster, even over 802.11b it’s fast to populate the metadata from an entire directory structure.
I’m right now sitting on approximately 12 GB of just family photos, so I have that same problem of just tagging them. So I’m only tagging new entries, and slowly working my way back. Once it’s done though it should be sweet.
Vista’s other advantage is that the metadatabase is stored in the actual files, so it’s 100% transferable to another machine or even another platform. Although I havn’t tried it, I’m told it even works with iPhoto ’08.