As far as i can tell the nas network/chain is still working fine.
What's still needed are more nodes to secure the network and stabilize it.

In order to connect there are, unfortunately, some things to check:
- If you can't find any node you need to add some peers to the wellKnownPeers in the nas config (using tikers public node or the informations provides in this thread)
- Using the nas Version 1.1.3N2 may help, i think the known peers are added there
- depending of your nas database you may need to rollback to a previous state or start from scratch. The nodes/wallets and database from the exchanges (Poloniex and BTC38 as mentioned)  might have a state where connection to the existing network doesn't work anymore. (forks, broken DB, …)
Last time I checked, 1-1,5 month ago, starting from scratch worked perfectly when connected to at least one of the well known peers.

I'm not sure if poloniex even tried to connect/sync there node. I still have some nas there and till today they tell me that they send/transfered successfully the nas coins. But unfortunately I can't find  the mentioned Transaction on the network, nor did I ever receive the coins. On the withdraw page the transaction is still mentioned as successful and there are no nas left in my account.

 
@CryptoJohn:
What's your nas account? I could try to send you some nas.
Did your account worked before?
Is it a new account?