I always love when devs come up with creative ways to do things. John pointed out to me that EcuadorBB has released Collect for BlackBerry. Its a relatively simple expense tracking app with a very cool twist. It lets you easily enter your expenses using the native BlackBerry calendar app. You simply create a new event in your calendar in their format with expense name then cost (plus or minus) and the category. It will them automatically record them in your local database.
All in all a very cool idea though I would have liked to see some Quickbooks or at least an excel export feature. If the idea intrigues you then check out Collect in App World for $2.99.