Google does Powerpoint

Google rocks!!

Once again they have added something incredibly useful to GMail and Google Documents.

View as slideshow
Now you can open PowerPoint attachments as slideshows, without having to download anything. Just click "View as slideshow" next to the .ppt attachment you want to preview. Since you can open .doc and .xls attachments with Google Docs and Spreadsheets too, there's no need to leave your web browser to check out your Gmail attachments.