EDIT : AS OF 08/22/2017, 1:42 PM EST, http://blocktrades.us is back with it's steem deposit and withdrawals! :)
Poloniex has disabled it's Steem and SBD exchanges but that's pretty common for them.
But today, I noticed that even blocktrades had stopped dealing with Steem and SBD. I'm not trying to create mass hysteria but a little bit of an update would be nice. Regardless of whether other exchanges are supporting Steem or not, blocktrades has been the most reliable and go-to place for many of us so I would hate to see it disappear and stop supporting this platform :/
I'm not trying to panic but I can't help it. I've been reading a lot of articles about steem nodes having issues and a lack of witnesses so I'm just concerned. Below are images where you will notice that Steem, Steem Power and Steem Dollar (SBD) deposit and withdrawals have been removed for the moment. You can check them out here: http://www.blocktrades.us