UNHCR's official WRD campaign is Do 1 Thing. The site provides access to videos and photos, as well as encourages participation in raising awareness of refugee issues. The companion Facebook page offers this badge for people to show their support.
The refugee agency has also released its review of 2010: UNHCR Global Trends 2010; here's the press release. Statistical annexes are available on this page for downloading.
There are so many activities and events taking place to mark WRD 2011 that it is impossible to highlight them all! However, I will include references and links in my regular line-up of posts as I come across them and when they are appropriate and relevant.