If Outlook synching isn't your thing, then a new app called ZBook is a great way to backup your phonebook effectively, easily and automatically. Your phonebook will sync to the ZBook servers manually or daily at a preset time of your choosing. ZBook also supports the importing of contacts from Outlook, MSN, Hotmail, Gmail, Plaxo, and Yahoo to your online account. Features include:
It would be hard to justify purchase with Google Sync being free, but if you're a non-Google user this may interest you. The price is a little steep at $9.99, but the features may be enough to justify the price. Head over to BlackBerry App World to download.