I think the person initiating the wire transfer would still get charged their normal fee, and dwolla doesn't support wire transfers out yet, this only saves the fee to receive wire transfers in the case that you don't care about speed (Dwolla is slow to your bank account for most people).
That is considered an ACH transfer, which is the same way that you normally fund your Dwolla account. A wire transfer allows larger amounts and is much quicker but usually has significant fees attached to it. ( As well as some other differences)
So can I transfer money into my Dwolla account with ACH, and then wire transfer that money to someone's bank account (possibly oversea)? That way the whole process would be free.