Author here. Hacker News has long ago blacklisted/blackholed my domain (I am often critical of YCombinator's investment strategies), but the original post can be found on my blog http://warpspire.com/posts/pixels-dont-care — with apostrophes!
Also, what is the #caboose channel on freenode about? I tried joining to see what it's about, but it looks like it's invite only.
Your site isn't banned, and we don't moderate sites based on what they say about "Y Combinator's investment strategies". I'm not sure where you got that.
Your site was getting mildly downweighted. That could have happened for a number of reasons, including vote manipulation and/or too many lightweight articles. I've taken the penalty off.