Do I need to get my coins out of bitstamp for safety?
Better safe than sorry. You really should. Remember that here even in january when the insolvency of Gox where obviously obvious there were still people to tell you there is no evidence and to believe there is a good reason for them to delay USD, euros, yens and bitcoins withdrawals. Just make a cold storage instead of trusting anyone, that is the point of Bitcoin.
Didn't they pass a solvency audit prior to the fall of Gox?
To the best of my knowledge, the only exchange that proposes to any customer a trustless audit is Vault of Satoshi. Bitstamp has been audited but even the auditors did say that there were ways to trick them. Besides, Bitstamp is not legit, on the contrary of, for example, bitcoin-central or bitcoin.de, and if there is one lesson provided by the Black Friday in online poker it is this : even if you are a large, old and successful business, you don't mess with the US government. Pokerstars is a billion dollar business but still not legit in USA, and Bitstamp could totally have its Black Friday considering that legit US exchanges are about to open and they are an "unfair" competitor. Do not trust them because you have no reason to do so. I am not saying that they are as shady as EmptyGox obviously, just that with the history full of scams and hacks of Bitcoin, your default behaviour should be not to trust any third party for any meaningful amount of BTC.