Along with the exciting developments from Google I/O highlighted on Gizmodo, one small but useful feature was seemingly not covered (or I just missed it). Google Wallet is now integrated with Gmail, which will allow anyone to send and receive money securely right from Gmail. It's free to send money as long as you link your bank account, however, there is a fee when using a credit or debit card. Fees for the use of credit/debit cards are currently set at 2.9% or a minimum of 30 cents. I haven't had a chance to try this feature out myself, but it could be quite useful.
Source: Google Commerce