I'm still waiting for some SBD transfers to Polo as well, a recent test one and an older one from 2017-06-20. They may have reactivated the wallets, but I'm not so sure it is working yet, or they are still processing some huge backlog.
I also have a Dash withdrawal stuck on "pending" for an hour at Polo.
8 days ago i sent 3 SBD to Poloniex. Wallet is empty! (