Not that add-in directly. You could take the original code (it's in the SDK) and turn it into a standalone executable then be able to call it from Python. At 10.1 we are adding this as a GP tool. So you could sign up for 10.1 beta and try it out!
Unfortunately, there is no easy way to get a traversal result via python at 10.0. We addressed the issue at 10.1.
To do it at 10.0, your best bet would be to create a custom GP tool. That way, you could reference it from within the same process as you execute your python script. There is documentation about custom GP tools in the SDK. If you are comfortable in geoprocessing and in .NET ArcObjects development, you will create a GP tool using the relevant parts from the traversal result add-in .NET code.