I know of a free feed that can be used to compare the rates of USD, EUR,
JPY,
CYP,
CZK,
DKK,
EEK,
GBP,
HUF,
LTL,
LVL,
MTL,
PLN,
SEK,
SIT,
SKK,
CHF,
ISK,
NOK,
BGN,
HRK,
RON,
RUB,
TRY,
AUD,
CAD,
CNY,
HKD,
IDR,
KRW,
MYR,
NZD,
PHP,
SGD,
THB,
ZAR. If this is sufficient, I can use this free feed to sync your database using crontab. Contact me for more details via PM.