In order to use the billQ Widget with the new version of billQ, you need to get the updated file. Because some things have changed in the background, the old widget is unable to connect to the billQ servers. To get the new version of the widget just go to the Tools page in your billQ account, or download it directly from the link below.
The official billQ Widget v1.1 v2.0
http://www.mybillq.com/app/files/billQ.wdgt.zip
If anyone has any issues with the widget, let us know.
UPDATE: There is now a newer version of the billQ widget (v2.0). If you have v1.1 you are not required to upgrade but it is recommended.