Got a webmaster-related question or suggestion that is not directly related to the topic of this entry? Instead of posting it here, your best bet is our official Google forum linked from http://www.google.com/webmasters/
I've only found mention of that comment in one blog post, but I'm surprised Matt didn't do it earlier. After all, I can imagine he's in demand and Google Groups is not really a widely known avenue for assistance from those I've spoken to.
The bottom line is that if you need assistance on your website, the blog of Matt Cutts is not the place to ask for it; there's a really useful Google Groups for that.
Forum discussion is at Google Groups.