Is it possible to put?

If you mean a "page" really, no... Only in records.

@bfarber Is this a possible add on?  It would be SUPER useful.

There is no built in capability at this time. Of course, in theory "anything" is possible with custom development.

I would use something like this. Something like a "guestbook widget" block that collects and displays comments on whatever page it's placed into.

I tried briefly to fake one by creating a database with one placeholder entry, attempted to hide its title and content with display formatting and CSS,  and show only the comments. I quickly got lost at the intersection of Templates and Plugins 😛