With regard to whether Kant was relevant, I quote the article we are commenting on:

The problem with bringing up Kant here is that he simply doesn't belong. "Don’t [lie] to anyone unless you’d also slash their tires, because they’re Nazis or whatever," is very different from Kant saying (paraphrasing), "Never lie, ever, or else you're a bad person." An argument against the former by conflating it with the latter doesn't accomplish anything. Further, there's no mention of all the stuff Kant has to assume in order to argue for the Categorical Imperative and, finally, the value of radical honesty.

In other words, I agree with Andrew's criticism of you (among others) for bring up Kant in the first place. He simply didn't belong.

...there is plenty of contemporary philosophy that still uses a lot of Kant and even NPOV Wikipedia has a section detailing Kant in contemporary philosophy.

First, I should be clear, I was only talking about Kant's ethics. My fault for not making that more clear to begin with. However, I don't think this counts much in Kant's favor because there is plenty of contemporary philosophy still using ideas from Plato or Aquinas, even when they are pretty clearly wrong (metaphysical realism, anyone? How about agent causation?).

There may be something worthwhile in Kant, but I'm rather skeptical. Given what Kant I've already read, I think my efforts are better spent elsewhere. If you think there is something worthwhile in Kant, then by all means, tell us about it. It may make a good post here.