Baseline Analytics checks in on a monthly basis the status of the yield curve as displayed on StockCharts.com. StockCharts does a great job showing the yield curve dynamically, correlating it with the price of the S&P 500 since the late 1990's.
Here's a snapshot. You can run the dynamic activity by visiting this link.
Marc chandler wrote this interesting blog as we think about the components of the yield curve and what it's up to. Click here to see Marc's blog.