USAIR unfortunately gives R/T vouchers instead of $ vouchers, which means you don't makes miles on the voucher travel, still a good bump my wife and I were able to take a ff CDG->PHL->RDU last leg. We used the bump vouchers for a R/T RDU->LAX->FAT, both got bumped in LAX for two more vouchers. Found out then both vouchers could be in her name and she joined me on two more business trips later in the year (not then, but now vouchers are transferrable). She ended up with 3 free R/Ts originating from a ff flight. For any airline, tip would be to ask gate agent right when they arrive if flight is oversold, then ask to volunteer. Voluntary bumps go in order of listed volunteers, not your ticket type or elite status. It helps to be #1 on the list when they start working the list backwards calling names to take a seat. I check luggage every flight, if you don't, main negative about volunteering is you've given up any chance of getting overhead space if you have to board.