Would you like Office with that?

When Office 2010 hits retail shelves on Tuesday, one of several new options will be for new PC buyers to purchase a product key card that upgrades their machine from a limited free version called Office Starter to the full version.

Though good for only a single machine, the product key cards will be cheaper than the full boxed copies of the software, which can be used on either two or three PCs, depending on the edition.