Gmail Tests Open In Google Spreadsheets Link

Philipp Lenssen reports that Google is testing a link to open your Microsoft Excel documents within Google's Spreadsheets application. I tried sending myself an XLS document, but I did not get the "Open In Google Spreadsheets" hyperlink. Philipp has a screen capture of it in action, and he explains, "We can expect much more of this cross-integration to be rolled out in the future."