You know in flickr...

[grum]

Is there a way to upload full res files but only have lower res ones available for download?

Can't seem to find it in the options if there is. Quite like to have full res ones uploaded as another backup, but don't really want people to be able to take them without asking for them.

 

[Digital Scene]

In privacy settings when you upload the image you can set different options, one being so only you can see the image.

You could upload a hig res image there for backup, then upload a re-szied one for others to see!

 

[TheBigYin]

to be honest, that's what I do for stuff to be shown on here - that way I can actually get a full 800px longest side image, rather than the 500px or 1024px that flickr choose to give.