Mt. Gox has been ignoring us as well. We have lifted our main account's withdrawal limit, but the activation of yubikey breaks the Withdraw API. There's not enough documentation on how to use API key-secret authentication in Ruby (and worst, the ruby gem we use doesn't support it).
The required government IDs and address proofs have already been sent two weeks ago, for lifting the limits for another account. They didn't reply a single word.
Bitcoinica's main Mt. Gox account has hedged over 200,000 BTC in only 2 weeks (about 1/5 of Mt. Gox total volume).
It's troubling that they ignore one of their biggest customers (if not the biggest).
They've got a registered support account on the forum now but that really doesn't excuse them believing that making announcements on their website saying that they're having problems processing payments for whatever this week's reason is counts as communicating adequately with their users. They need to be far more contactable than they are now, especially when they're experiencing problems with multiple financial institutions.