Although the iPhone now hooks up to Microsoft Exchange servers, the Web-based HyperOffice ($44.99 per month for five users) remains a good option, especially for small businesses. This solution synchronizes your iPhone e-mail client with Microsoft Outlook running on your desktop, and with Microsoft Exchange. SMBs should consider this solution; without any extra software on the iPhone or behind the corporate firewall, employees can access shared calendars, contacts, tasks, and links.