Bitinstant.com is the easiest. Just create a pending transaction on theie site (give them one of your bitcoin addresses, and tell them how much you want to buy

Bitinstant.com is the easiest. Just create a pending transaction on theie site (give them one of your bitcoin addresses, and tell them how much you want to buy) They give you a bank account #, and you just walk into that nearby bank with cash, fill out the deposit slip, and wait about 30 mins.