The site app.edengame.net, which has a description of Eden, screen shots, and pointers to the App store, has been "down" for a while. I have used several "is it down" websites (http://is-it-down.com/ , http://isitdown.co.uk/ , http://www.isitdownrightnow.com/ , http://downforeveryoneorjustme.com/ , and http://isitdown.nl/ ) to check it from different places in the world. In all cases, "forum.edengame.net" is working but "app.edengame.net" is not.
I think this may be interfering with searching and downloading worlds. I haven't tried uploading. The featured list seems to still work.