Hello,
If you are transferring funds from Dwolla to Mt.Gox, it takes no more than an hour for the funds to appear on your Mt.Gox account provided that you have included the correct message of your Mt.Gox number that you see on the Dwolla 'Add Funds' page. If you have trouble with having your Dwolla deposit credited to your Mt.Gox account, please feel free to contact us at
https://support.mtgox.com/ so our team can help you locate your deposit. We look forward to being able to serve you at Mt.Gox.