Box.net can also collect statistics on who has viewed the document and how many times. It cannot, however, collect those stats if the document is downloaded and edited by a desktop app such as Microsoft Office, or a via Box.net partner app such as Zoho Office.
Another new feature is the ability for users to easily embed links to the documents stored on Box.net on any Web page or site.
To appease enterprises, Box.net expects to win the SAS-70 data security certification in February.
While Levie grants that Google has the engineering prowess to easily add its own document viewing feature, he argues it's low on its priorities.
"Google is not focused on content. They don't have an admin console, no reporting on who is sharing what, no workflow or collaboration features in their shared folders. That's where we sit apart," he said.
Microsoft's SharePoint, even its SharePoint Online version, remains a complicated option for those focused on quick file collaboration with people outside of their company, Levie said.
Larry Hawes, an analyst with Gilbane Group, says Tthat may be true and he likes Box.net's new improvements, but he's not ready to call Box.net a SharePoint killer yet.
"Box.net is a good alternative to SharePoint for file-sharing, but SharePoint is so feature-rich, there are so many things that Box.net doesn't attempt to do," Hawes said.
Eric Lai covers Windows and Linux, desktop applications, databases and business intelligence for Computerworld. Follow Eric on Twitter at @ericylai, send e-mail to firstname.lastname@example.org or subscribe to Eric's RSS feed.