Google Checkout has already attracted over 100 stores and some big brands!

Last week, Google introduced Google Checkout, an online checkout system that lets people make purchases from participating merchants using a single sign-in system. It competes with Microsoft Passport, the less than successful attempt at a universal Web passport and payment system.

And like all payment systems the proof initially is in the amount of merchants that adopt the system. If you get enough of the right merchants - you should get the users.

After a little research it looks as though Google is on a good track. They have already attracted over 100 merchants including Levi's, Timberland, Buy.com and Starbucks Store.

Now lets see if the users follow. TechBoard will keep you posted.