You write a nice little article that could be written anytime about how to get letters published in the Post. That doesn't have to run on this Sunday.
You completely ignore the biggest story in the blogosphere that week involving your pubication. This is how one of your Washington Post online bloggers compared the gentlemen who flew a plane into the IRS building in Texas to the Tea Party protesters. This set off a storm because the online manifesto left by the man included rants against big business, supportive words from Karl Marx and hatred of George Bush. Not exactly "right wing" or conservative values.
To make it worse it looks like the blogger, Jonathan Capehart, deliberately omitted the left wing parts to enhance his case. That is not good journalism practice and might be worth addressing by the Ombudsman.