Audit away, we will find what most people already know, TP rallies were organized by lobbyists with deep pockets and the OWS was truly an organic thing with no clear leaders to send a bill to, seriously, who would you contact in the OWS to send a bill to?
Communist party of america, SEIU, George Soros. Oh wait, some of that missing 2 trillion dollars could be enough to erase the paper trail, that and we have a justice department that is too incompetent to do it's job to investigate anything anyways.
Yes while we are at it let's simply investigate all of the money used in any recent protest movement, the tea party would shit a brick if their money trail was exposed for all to see.
I'd love to see it. I am convinced it would shock and confuse you. There really isn't very much money being spent by the TPM. It doesn't cost very much to create and service web pages. The individual chapters have members which support them, but there is no overarching organization that funnels money down to the local orgs.