The Transgender Day of Remembrance was set aside to memorialise those who were killed (or forced to suicide) due to anti-Transgender hatred or prejudice., and is held annually on 20 November. The Webcomic Project is where participating contributors draw and publish a relevant webcomic or image for the day (or equivalent date, depending on schedule) with links to other contributors and/or the archive. The main thing is to educate the readership of each person's webcomic or blog about the issues listed above.
You don't have to be transgendered to join, just appreciating the tragedy of the lives lost that are memorialised is enough. What you do need is a suitable image or comic that appears on a site (webcomic, blog, Live Journal et cetera) read by others. If you do a webcomic yourself it could be included in that, or in a related blog if such would be out of context for the webcomic.
If you do participate, be sure to send a copy of your contribution to the Archive where they will be uploaded later for posterity (details of how to do this are at the site). This year's theme is "Open" - You may do whatever subject you like, related to the day.