It has been announced that "Coin Project" has been launched and made available for public use. Among other things, the site allows users to catalogue coins of various types and upload images.
I was invited to test the site several months back and it appeared to have several promising study applications. I have been unable to spend much more time with it than that, but I am sure that I will have cause to use it in the future. The website will no doubt become a source for quick images and will be consulted by researchers, especially now that CoinArchives is available only through paid subscription.
The architect of "Coin Project" discusses it in more detail here.