All I can say is it is about time Google included this information. I always thought it was such a pain for Google to report 404 or crawl errors and not tell you what the source was. I would often spent hours looking for references to clean my list.
My biggest shocker is the amount of links I have pointing to my pages with session IDs included. Are Webmasters really this stupid? I guess so.
Log into your account and check if you have any errors…and you’ll see a nice link with the pages linking to that dead page.
The main reason I started the SEO Revolution was out of frustration. Frustration at all of the lies and misconceptions that are posted in forums, given as advice in teleconferences, and even taught in live workshops. "So why didn't all of this work?" " Why wasn't my site successful?" " Why am I still stuck in a rut?" 
I was stunned when i read this in your newsletter, so popped into WMT, and sure enough, there they were!
Funny, not four or five hours earlier I was looking at a site with a lot of 404 errors in WMT and the info wasn’t there, and I thought to myself, “WHEN are they going to add this?”
As always, your monthly newsletter was the first place I saw, read or heard about it, and you even beat any of the people I follow on Twitter.
Thanks again, Jerry