I'm building a hosted load testing solution at the moment. There's a little more to it, but that's the idea. I'm close to where I thought I'd be--I need about another month to get it really going and a month or so after to tune and iterate.
My solution will require no hardware, be based on an open source tool people might already be using and be ridiculously easy to use if I hit my mark. I'd like to make it self service too.