The forums are available in read only format, according to the last post from Loxone there are no plans to remove them just yet.
A number of community members have created new forums, but i do wonder how successful they will be with the branching off.
Google Groups: https://groups.google.com/forum/#!forum/loxone-english
Loxusers : http://www.loxusers.com/forum/index.php
Loxforum : https://www.loxforum.com (Currently only in German)