When we first reviewed the Helio Ocean a couple months ago, we thought the killer application would be its support for Microsoft Exchange ActiveSync, which was unfortunately unavailable at the time. The Exchange integration would work well to bridge the gap between the young hipster types that are Helio's core audience and mobile professionals. Well, today's the day, because that Exchange application is now here. As was reported by Engadget, the Ocean is finally getting the Exchange ActiveSync support, including an improved version of Helio's file viewer that supports Microsoft Office documents. It's not free, though: The whole mobile office package will cost $10 a month on top of your regular fees. But you do get free use within the first 60 days, and an extra $10 isn't too much to bring your work with you on the go.