Nikhil has just released a new version of his irreplacable Web Development Helper tool. If you’ve been coding in ASP.NET AJAX (Atlas) or in another AJAX way that submits XMLHttp requests and haven't been using this tool you've been missing out on a great tool that really helps with debugging and troubleshooting asynchrounous requests.
He’s added a bunch of new features to check out including: JSON viewers, a new viewer for partial rendering scenarios (focusing on the ASP.NET AJAX UpdatePanel), and an installer that solves some of the earlier headaches and that is Vista compliant.
Check out his blog post about the release here. And download it from his project page here.