Our service works only with the new checkout manager. Yahoo! has announced that all merchants will be migrated over to the checkout manager in the future, and that all new signups as from April 2006 will get the checkout manager by default.
If you wish to use the Google Analytics connector for Yahoo! Store, You will also need a free Google Analytics account, which you can get here. You should be able to get your email invitation code within a couple of weeks, or almost immediately if you are an active Adwords customer.