This isn't the first time this happened. Three months ago I had BTC withdraw problems [1] with MtGox. It took them about 5 days to send my money. That's when I decided "fuck this shit" and moved to BitStamp. The difference between how the two exchanges operate is night/day. Even if they have legitimate technical problems, it's just not worth using them.
Don't get Gox'd, use a better exchange.