For those who care, here's an update on my 30,000 XRP that disappeared during a withdrawal on Poloniex to Kraken.
It looks like it was Kraken's fault. While waiting on Poloniex support I hit up Kraken's to see if they could help.
After two weeks (a week between emails) with Kraken's support, they deposited my coins! They blamed it on the new traffic but that's a load of bullshit.
I correctly entered my ripple wallet address and destination tag. Is transactions to ripple wallets supposed to be quick? Kraken fucked up.