From wikipedia:
According to Astley's official website, he is currently writing and recording a brand new album. No release date is listed.
In mid 2007, an internet phenomenon known as "Rick Rolling" began to spread rapidly. "Rick Rolling" consists of tricking internet surfers into clicking on hyperlinks routed to Astley's video of "Never Gonna Give You Up" [1]. One hyperlink frequently used is a classic MTV version of "Never Gonna Give You Up" posted on YouTube on November 27, 2006. As of June 20, 2007, the YouTube video had been viewed over 1.1 million times [2]. The phenomenon also spread to the Urban Dictionary, as evidenced by the multiple "Rick Roll" entries with similar definitions [3]. Several popular TV shows have utilized the Rickroll including Last Call with Carson Daly on June 21, 2007, and Family Guy, with its spoof on "Never Gonna Give You Up" in the season 5 episode "Meet The Quagmires" [4].