http://imtgapp.com/forum
If you want to link to a post on iOS device, the trick is to press and hold on Up or Down button until a menu appears, and Copy. When you Paste it someplace, you can remove #top or #bottom from the end of URL.
http://imtgapp.com/forum/index.php?theme=1 is the 'desktop' version of iMtG Server web interface.