Posted this on Blackfacility blog but I will just copy and paste it over here too:
Just did up a currency exchange rate notifier. It will notify you (on twitter) if a forex exchange rate exceeds a certain value.
If you are interested in the service, send a message to @bfalert stating the two currency (e.g. USD/SGD would refers to exchange rate of USD to SGD) and the threshold.
As always, if you find the service useful, or have other comments, please send it to us 🙂