We have run in to a few cases of resource abuse problems that are related to a known BlogEngine.NET pingback spam issue. In certain situations the pingback spam can create a loop and the process of continually writing to your BlogEngine.NET files consumes a tremendous amount of server resources. http://dotnetblogengine.net/post/Stop-Pingback-Spam.aspxWe recommend that anyone using BlogEngine.NET take a few minutes to read the above article and follow the steps it outlines. Please also take this opportunity to ensure that you are running the latest version of BlogEngine.NET (http://blogengine.codeplex.com/releases/view/39387).