What are some alternatives?
When comparing AltaMail and Air Sharing, you can also consider the following products
CalPrint - CalPrint uses your existing reminders and calendar entries on your iPad or iPhone (Exchange, iCal and Google Calendars etc.
Printer Pro - Print attachments, receipts, documents, web pages from your iPad and iPhone.
ePrint - If you have the right printer, “ePrint” will let you print directly from your iPhone or iPod touch.
Print n Share - “Print n Share” for the iPad, iPhone & iPod Touch is the best printing and file sharing app.
Pogoplug - Pogoplug is cloud storage which provides unlimited storage.
NotePrinter - Developers of application solutions for the iPad or iPhone. 'Printing on the iPhone: “There's an App for that” - Print & Share' as featured in Apple's “Office” iPhone commercial