I wonder if there will be unintended consequences if this gets really popular. There always seems to be that 'one engineer' who has a combination of good architectural taste, a lot of historical knowledge, and an ability to pull out the wheat from the chaff. Currently the thing that allows them to get anything done at all is that you physically have to go over and bother them if you would like to get their input, but if they start getting a stream of mentions perhaps it would simply get turned off.

That being said, I'm all in favor of putting a user id or group id in a TODO(username) in comments so that whattodo(name)* can give me a list of things in the source base that could use my, or someone on my team's attention.

[1] implementing the whattodo command is left as an exercise for the reader.