stuartmcdonald - 3:00 pm on Oct 29, 2008 (gmt 0)

Very crummy rate from USD to AUD as well.

Consider this, month on month:
Payment made 28/8/2008 Exchange rate 1.165 (Oanda) 1.168 (Google) - Diff 0.003 in Google's favour
Payment made 26/9/2008 Exchange rate 1.194 (Oanda) 1.187 (Google) - Diff 0.007 to Oanda by a tad, I can live with that.
Payment made 28/10/2008 Exchange rate 1.634 (Oanda) 1.487 (Google) - Diff 0.147 to Oanda not happy!

Even taking into account the rate Google gets may not be the equiv to the interbank rate quoted by Oanda, you would nevertheless expect them to be off by a similar amount each month.
[edited to correct rates]

[edited by: stuartmcdonald at 3:07 pm (utc) on Oct. 29, 2008]