Tranfers to MtGox via redeemable USD code (do NOT exchange to BTC, huge fees on Bitcoinica for that). Link up Dwolla to MtGox. Transfer USD from MtGox to Dwolla. Link up checking account to Dwolla. Transfer USD from Dwolla to checking account for 25cent fee.
If you don't already have all those accounts set up and linked it is going to take you a while, at least a week, to complete the process. See how easy Bitcoin is!!! /sarcasm
what are the fees for doing this??
It will be 25 cents total for fees. You only get charged for the MtGox transfer to Dwolla.