If you like me have been struggling to keep your passwords and notes in sync on your iPhone and your Mac, you will be pleased to hear that 1Password now supports DropBox for syncing data between iPhone, iPad and Mac computers.

“1Password 3.3 added tighter integration with Dropbox to enable automatic syncing between Mac, iPhone, iPod touch, iPad, and Windows. Also known as “syncing to the cloud”, this amazing feature allows you to keep your Macs, Windows, and iOS devices in sync at all times, even when they are running on different networks. To enable syncing, simply configure 1Password to store its data file in Dropbox.”
From 1Password 3.3 release notes

To enable syncing you need 1Password 3.3 for Mac, and 1Password Pro 3.5 for iOS. On the iPhone you need iOS 4.0.

Full details on how to configure 1Password DropBox synchronization