Wondering what sort of programs you all use to stress your servers to get an idea of what sort of load the server can handle. I have used Microsoft's Web Application Stress Tool in the past, but don't like a few things about it.

Anyone else know of other programs that do such a thing? Especailly a program that can traverse a dynamic site and randomly stress different pages? (Though I would assume this is much harder to do because the testing computer would have to be about equally as powerful as the web server...)