Charlie Shrem raised the alarm about Poloniex:
It seems he has some information about the exchange and he's sending people DMs on Twitter.
Lately, lots of people having being pulling their coins out of Poloniex because of margin calls (Poloniex didn't halt trading during a weird downtime), which made lots of people angry. They're also banning folks on their exchange chat left and right for bringing it up.
I know lots of Maidsafe holders have been using Poloniex as their MAID wallet since it was somewhat convenient and I believe you're also paid interest if you lend your coins. I'd hate to see massive losses in case this exchange goes down. A huge % of all the MAID that have been issued are held on Poloniex.
There are good wallets that let you control your private keys and you don't have to be a rocket scientist to you use.
Omniwallet - A User friendly web wallet that allows you to export you private keys
Omnicore - And a desktop QT wallet that comes in Windows, Linux and Mac flavors (the wallet downloads the 100+ GB of data so it takes a while but it's the most secure option) http://www.omnilayer.org/download.html#download
Worth mentioning Coinpayments is another relatively secure web wallet where you can store your Maidsafecoins. I believe they are endorsed by the Maidsafe team. Recently they've been part of a joint promo event in Asia.
The upside to using Coinpayments as a Maidsafecoin wallet is that you don't need any extra BTC to move coins back and forth. The downside is that you don't control your private keys. Coinpayments seems to be pretty reliable, though.
Android and iOS wallets