Conference announcements

Hello,

as you know, Frogs is not moderated, what allows for some quick discussions.

If we make the address of Frogs available on the web, then we are 
almost immediately spammed and we are then forced to moderate it.

One risky thing to do is to cross-post conference announcements. I 
think it's better not to use Frogs for these. As a matter of fact, 
the PT list is a superset of Frogs, and is moderated, so it can 
freely be used for (relevant) conference announcements.

Just my opinion, of course.

-Alessio