Apple has launched a number of new enhancements to its iWork.com beta Web-based document sharing service, including improved access on iPod touch, iPhone, and iPad devices. Mac Rumors reports that an email sent out to iWork.com users touts a redesigned user interface, which includes “a redesigned Sign In and Shared Documents page for iPad, iPhone, and iPod touch [that] makes it easy to access your documents while on the go. The new interface…