Is there a thread somewhere about the current BTC value? Some kind of discussion thread?
There is a whole section about it:
https://bitcointalk.org/index.php?board=57.0
The single topic closest of what you want is the wall discussion:
https://bitcointalksearch.org/topic/wall-observer-btcusd-bitcoin-price-movement-tracking-discussion-178336
Yes exactly. The Wall Observer is the thread where people meet and discuss every minor movement, and of course all the big ones. "Wall" is a term that describes a huge amount of coins that someone is offering at a certain price or offers to buy for a certain price. (See "depth graph")