The Visa Mobile Application (Visa Mobile BETA) is now available for Android, is in the Android Market, and you can download it to your T-Mobile G1. At this point in time, you need to be a Chase Visa cardholder. With this app, you can get real-time alerts to track your daily transactions and get offers on special deals for cardholders. This is also a great way to track for unauthorized use of your card, particularly in this day and age of more frequent identity theft. Chase partner cards (airline, retail, or university partners) are not supported at this time. It's a free download, so if there are any Chase Visa cardholders out there willing to give the app a spin, let us know in Comments what you think!