PrintJinni for Epson printers is a new iOS app developed by Thinxtream Technologies. It allows iPhones and iPod touch users to print documents from an e-mail account to any Epson all-in-one device with Wi-Fi. The application supports Gmail, Microsoft Exchange, MobileMe, AOL, and other IMAP-based e-mail services.
You can print jpeg images, PDF’s Microsoft Word, Excel, and PowerPoint documents. The app is currently available for an introductory price of $7 but that will increase to $10 for a one year subscription.