Photo databasing sites/programs?

So I was wondering if there is a good (preferably free) program for giving pictures tags (kinda like Picasa 3) and being able to access the pictures with their tags over a network. Picasa 3 has the option of adding tags to pictures on one computer but then the tags don't carry over to another even though the pictures are on a shared drive. Any program recommendations? Or even a website as long as only my computers can access the pictures. Thanks for any replies.

Not sure what that is, you could inquire about it in DeviantArt.