Glogster can be used to create online posters. The posters can actually include video and sound, also weblinks.
Note the link near the bottom right of the page to the Educator Resource library which includes examples of uses of Glogster in the classroom.
Click download for a pdf.
Traci Blazosky has written a Glogster tutorial which includes instructions on registering with Glogster.
(To print your poster, with the poster displayed, right click and then choose Print.)