Yahoo Dynamic URLs Tool

Yahoo Site Explorer recently released a new tool called the Dynamic URLs Tab. It allows webmasters to have some control over how URLs for their site are being crawled and displayed. It seems a very useful tool for tracking codes and session ids, items that might not be able to be blocked(from being indexed) via Noindex tags. I've been keeping my eyes open on the forums discussing Yahoo topics and have found little thus far about anyone's experience using the Dynamic URL Tool. I submitted some changes today and we will see what effect it will have. With Yahoo stating that the have 'slowed down' their crawl, I expect it might take about a week to really gage the impact.