App of the Day on TUAW:
http://www.tuaw.com/2012/08/27/daily-iphone-app-bridge-call-dialer-speeds-conference-calling/

Bridge Call Dialer (BCD) enables you to join a bridge conference call with only couple of taps. The App constructs the long sequence of digits required to access the bridge call, based on a calendar invite. It will learn the conference codes you are using, and will be ready for a one tap dialing next time you are invited by the same meeting organizer. It is perfect for the corporate employee who needs to call into many different conferences through the day.

Capabilities:
* Auto retrieval of dial sequence for known conf hosts
* Support security code
* Notification at meeting start time
* Auto switch to local numbers when traveling abroad
* Support VoIP dialers
* support any format of numbers in the invite (even when the bridge number is not in the invite)


How does it work:
Open Bridge Call Dialer to see the upcoming invite. Tap the bridge number and passwords (in the title, location or notes fields) and click the CALL button. That’s it!
The bridge number and the pause, #, and * keys that are required before and after the password, can be set as default or quickly changed on the fly.