Nested replies, commenting, etc

Is is possible within the elgg structure to have nesting of replies/comments to posts/messages in whichever are (group discussion, blog, message board)?  A common example would be like what you find at Huffington Post:

- + americanalien See Profile I'm a Fan of americanalien I'm a fan of this user permalink

Bin Laden loves George Bush. That's why he got him re-elected back in 04. I wouldn't be surprised if Bush pardoned Bin Laden. The two of them work hand in hand with each other to wreak terror upon the world.

    Reply   Posted 09:35 AM on 01/22/2009
- + robotfog See Profile I'm a Fan of robotfog I'm a fan of this user permalink

they could build exploding houses for Humanity

    Reply   Posted 01:12 PM on 01/22/2009
- + toddag See Profile I'm a Fan of toddag I'm a fan of this user permalink

oh... I thought you said Hannity.

    Reply   Posted 03:13 PM on 01/22/2009
- + lesterbud See Profile I'm a Fan of lesterbud I'm a fan of this user permalink

Absurdly funny.........but why, then, are Cheney and Bush still tight with the Bin Laden family and why has this hermit not been rounded up? 

  Reply   Posted 08:13 AM on 01/22/2009

 

It is a farily common forum/blog convention.  It seems like something we need in elgg.

Thanks,

Jim