Shade's LARP List is a website whose mission is to keep a list of all LARPs throughout the world. It is fairly comprehensive, though at times outdated (broken links, etc). In fact we are on the list as Realms of Wonder. Of particular note is the fact that there are announcements of upcoming events on the front page. One thing I would like to see is for someone (not me) to figure out how those announcements are placed and then get announcements of our events up there on a regular basis.
There is a similar site that lists various LARPs throughout the world at TheLARPER. I could not find the Realms anywhere on the site, but I believe the site is fairly new. It would be cool if we were there as well. More public exposure can only help our game.