In a move that will come as no surprise to anyone, Google is planning to set up an online store for third-party Chrome apps later this year.

It’s promising a secure payment system. It’s also got some documentation on how to write Chrome apps for the store but warns that technical details will probably change before launch.

The Chrome OS itself is supposed to be free. So is the Chrome browser.

Google is already claiming 70 million active users.

Google Wave, the company’s odd online collaboration service, has also emerged from beta and is general available.

The announcements were made at the Google I/O developers conference in California Wednesday.