Just started using the desktop software a few days ago and I really would love to see it come to WP. If you feel the same, please click on the link to help vote up.
https://getsatisfaction.com/quicken/topics/when_will_there_be_a_quicken_mobile_app_for_windows_phone
https://getsatisfaction.com/quicken/topics/when_will_there_be_a_quicken_mobile_app_for_windows_phone