Susan Moskwa, a Google Webmaster Trends Analysts, posted a thread at the Google Webmaster Help forums announcing a new tool her husband created. The tool is named canonicalizable tool and it basically shows you potential canonicalization issues with your home pages. Here is a screen shot:

What I find interesting, and this is not new, but honestly, it is new to me. Susan Moskwa’s husband is the lead developer of the LinkScape tools at SEOmoz. His name is Nick Gerner, so when Susan posted in the Google Webmaster Help , it sparked my interest:

In any event, the tool looks clean and simple and useful.

Forum discussion at Google Webmaster Help.