Looks like they are all there to me? Maybe you went past a threshold at some point?
I believe that the following is your most recent comment. If so, then I see nothing fishy going on.
Your comments can be found at http://news.ycombinator.com/threads?id=g-garron
Your submissions can be found at http://news.ycombinator.com/submitted?id=g-garron
Your last 7 submissions were killed, but that does not mean you have been banned. Most submissions are killed. Maybe you are just not very good at predicting what voters, flaggers and moderators will like. Or maybe the 7 submissions were killed by the dupe detector.
Disclaimer: I am not a moderator.
:)