<p>What tools are there that I can test out a WCF service?</p>

<p>I am expecting allot of load so I want to have an idea how much a single server can handle.</p>

Start with this:
http://www.codeplex.com/WCFLoadTest
It doesn't do everything possible with WCF, but it is the best tool to start with. Worse comes to worse, it's not that hard to write manual invocation code with web services. They are much easier to load test than web sites.