Is Private Messaging possible?

Sorry if this is off topic, but no one seems to be anbswering questions in the bar and grill.

so... can one private message anyone here? i know you used to be able to, but now i can't seem to figure out how...

also... can you "subscribe" to a thread that you haven't initiated, i.e. receive e-mail notifications when someone posts on it? Again, i think it used to be possible, but i can't figure it out now.

Sorry if these are disgustingly obvious questions. I'm often stumped by the mundane!

Oops, I just got the private messaging part figured out. what threw me was apparently some people don't have it enabled - which was why i couldn't find it.

the subscription part still has me stumped though...