The free OnLive Desktop app allows you to modify Word, Excel and PowerPoint documents on your iPad via the cloud. Now, the company is offering a $4.99 per month upgrade adding priority access, a cloud accelerated Internet Explorer 9 browser, and other features.
You can read more about the app here.
MacLife features a hands on review of the new product. David Pogue also reviews the product for The New York Times. He drools over the speed, technology and possibilities offered by the plus product.