I just got this email from them
Dear HTCSense.com customer,
HTCSense.com is undergoing a renovation to improve the services and value we deliver to customers like you.
Until the new services are ready, features previously available on HTCSense.com will be shutting down
. If you have been using HTCSense.com to sync your Contacts, Messages, Footprints or Call History, you can download your data through April 30, 2012
. After April 30, your data will no longer be accessible and will be deleted.
Download your .zip file by following these steps:
Log in with your HTCSense.com username and password Click the 'Download' button in the Account Overview section A .zip file containing your data will download to your computer for easy viewing
If you would like phone location or backup services for your device, please visit Google Play (formerly Android Market) and download an application that best meets your needs.
If you need additional assistance, please contact HTC Customer Service.
We apologize for any inconvenience. You'll be among the first to know when the new and improved services are ready.