How else are you going to include table data in your site? Here I'm using it as a list of wines available in a restaurant:http://leidiot.c5themepark.com/menu/wines/...
Nice CSS handles for styling with an optional <th> tag built in. Here is another example:http://bonappetit.c5themepark.com/sample-menu/...

Massage your excel file into a csv file and save it with the .csv extension; upload and select and you have your spreadsheet online. I have a sample of some softball stats here:http://performancec5.com/index.php/reviews/cvs_display/... . The css file below it shows some of the DOM handles available.