Microsoft released new features—and we're making Office Web Apps available in 7 more countries: Australia, Austria, Belgium, France, Germany, Russia, and Switzerland (in addition to US, UK, Canada, and Ireland). Now, you can embed a PowerPoint presentation or Excel spreadsheet in a blog or website. With PPP, viewers can page through a mini version of slides or view in full screen. After this interview highlighting the new features you'll see two examples of embedded files and more info about the updates.
Following embedded PowerPoint presentation walks you through the actual steps for embedding a PowerPoint presentation or Excel file in a blog post:
You can also read How to embed a PowerPoint presentation on a web page and How to embed an Excel workbook on a web page.
You can embed Excel charts and data the same way. Here's an example of an embedded Body Mass Index (BMI) calculator, using Excel Web App. Enter your own height and weight to find out your BMI: