Ever since Documents to Go came out on iPhone--both the standard version and with Microsoft Exchange Attachments--the publisher has been keeping our interest with promises of a version that could edit Excel documents and create new ones in addition to just viewing them.
That version, Documents to Go 2.0, is now here. The update brings Documents To Go back to fairly equal footing with rival Quickoffice Mobile Office Suite, which added Excel creation and editing support a month before.
In addition to viewing Excel XLS and XLSX documents, both Documents To Go apps can now also create new spreadsheets and edit existing ones. After taking a quick spin through the features, we can say it looks as if publisher DataViz, like Quickoffice, has been able to cram a lot of core features into a small space. There's support for multiple spreadsheets, and the capability to resize rows and columns and search cells (the Find feature). There are also formatting and typeface tools, and support for older, even password-protected, worksheets.
While the addition of Excel support brings this app back into direct competition with the Quickoffice suite, what's true in both cases is that it's infinitely easier to edit an Excel document on the iPhone than it is to create one fresh. However, if you must put your tapping fingers through the pages, then the opportunity is now, finally, here.