Of all those mentioned above, which ones can you further <blue>send on to a photo print service? </blue>
Ex. I know you can with Kodak Gallery, but I'm starting to hate their site, very unwieldy working with large albums.
Flickr is lovely, easy to rearrange after uploading, saves in original size, and has a 3rd party photo editor built in so you can tweak something after you've uploaded it already. I think their site sends to Snapfish, I'll have to go look again.

Flickr's site does send the photos to Snapfish. But if it is only a few pictures, I would download them and use a local service.

I've always preferred Shutterfly to Kodak Gallery for the quality of their printed products, ease of use /editing tools on the site, and customer service.