Issuu is an online publishing service and a creative community dedicated to publishing. With Issuu (pronounced 'issue') anyone can convert their PDF documents into interactive online publications.

With Issuu you can 

• Upload any PDF file and have it instantly converted to an online publication
• Embed your documents on any site, profile or blog with our standalone viewer
• Connect with your friends to see what they publish and bookmark on Issuu
• Customize your personal Library to show exactly what you’re interested in
• Find the web’s coolest publications in one place 

From Issuu.com.

Via Techcrunch