With Gmail, you can now view PowerPoint PPT attachments in your browser without downloading the attachment.

Editions impacted:
Standard, Premier, Education and Partner Editions

Languages impacted:
US English

How to access what's new:
In Gmail, open a message that has a PowerPoint PPT attachment, and click the 'View as slideshow' link.

For more information:
http://www.google.com/support/a/users/bin/answer.py?answer=30719