"It would be nice if LWN had an edit button that tracked the edit history of the comment. That way you can fix stupid grammatical mistakes and because you kept the history you can make sure people don't white wash their comments."
+1. Yeah yeah yeah I should proofread more before hitting submit, but still... (Not saying that on a tight budget that LWN probably has they should dedicated a lot of resources. Just saying, if somebody has that itch, +1 more person would be gratified)