I've blocked a few IP addresses that have been spamming the blog very heavily. The IPs came from China and co-location centers in the US, so it should impact any individuals. But, if you do find that you can't access the site from a system, please contact me. One IP address had spammed the site with 560 comment posts over a 2 month period. My filter caught the majority of them, but it's a pain to filter through them all just time make sure important ones aren't deleted.
From the beginning the site has had nofollow links for the comment section, because I don't want spammers to benefit from the spidering of this site. I may eventually turn off commenting all together since 90% of the comments are spammers, but I don't want to silent any potential dialog for the topics I do post on. If things continue to get worse, I'll just disable comments and ask for people to contact me directly for further discussion and questions