When you submit a comment to the blog, there's a slightly big chance that it gets identified as spam, but fear not. We're constantly monitoring the spam and while it might take a while before your comment will appear it'll get better over time as our wonderful spam filter is getting smarter and smarter.
umbraco.org gets pretty hammered with spam as this chart shows, so unfortunately we had no other choice than to implement a smart but also strict filter. The chart doesn't even show how the FAQ and other forms on this site gets spammed too.
However, we're lucky enough to be using Defensio - a really smart filter that over time will learn what's relevant and what's not on this blog. umbraco MVP Per "objects.dk" Ploug Hansen made the .NET api for Defensio and I'm happy to say that it works sweet with umbraco.