A day of remembrance to remember those who have lost their lives is being held at the Big Easy sim in Second Life on April 17. Those who have experienced the loss of a friend in a virtual world are invited to participate in this full day community event. A listing of those participating and their times can be seen here. My performance time is 9am PST/11am CST.
Along these very same lines, thesixtyone is in process of mourning the loss and remembering the musician Michael P Miller who died April 8th. 2008.
More than memorials, these are recognitions that befriending someone online creates a very real relationship and that the loss of someone has a strong impact on a person and community.