Andy Snook of Fastpath and I did a joint audit compliance session at the GPUG Summit last week. Now I see in CGMA magazine that there is a New tool to aid in the evaluation of external auditors. You can download the tool directly from http://www.thecaq.org/resources/pdfs/AuditorAssessment.pdf.
The PDF is a little wordy but the whole document is about a dozen pages and include a couple of nice questionaires around auditor performance. This seems like a nice tool for the audit committee toolbox.