How do I get searchable image hosting in the cloud?

[tennisexpress]

My company currently uses Picasa to host our images and links to them on our website.  However, we'd really love to have our images start showing up in searches.  Is there a way to get maintain our Picasa (or use another, similar site) and get the images searched by webcrawlers to say we are the source?  Or do we simply need to start hosting all of the images on our own servers?  Thanks!

[AdamThompson]

It used to be that you could embed images on your site from another site (like Picasa) and your site would show as the source. I don't know if this is the case. I would probably put them on my server anyways.