Thanks for the interesting petition feature. It would seem public comment was decided against, for some reason or another? To me, the credibility and viability of such a petition feature would be greatly improved with the capacity for public comment, discussion, and debate.
Another benefit to commenting would be the social aspect. Users could come to expect such an area not only to be a petition area, but also an area of public assembly. Imagine, a Town Hall Meeting, with the President--online. Or what if the President is just overwhelmed with an issue, and really wants to hear from real Americans, on the issue?
An extension of something like that would be a group-sourced Request for Comments feature. Let's say the President is contemplating revising ideas set forth in the original implementation of the Jobs Bill. Using our Whitehouse.gov profiles, we could identify ourselves and comments with certain 'tags'. For example, I am a Systems Engineer for one company, and a Systems Architect for another. My profile could reflect that, and could facilitate very powerful sorting features, for the President. An example would be the CEO of G.E. being able to mark a section of the Jobs Bill he disagrees with, and allows for him to leave a comment readable by Executive Staffers, and the public (optionally?). I am able to do the same, except, maybe people think I am not quite correct, in my thinking, compared to the CEO of G.E. Being a public forum, people could rank and allow a basic means of comparison, for both opinions. Being the President, you could rank and compare your ranking against the public's rankings. I don't think this should be the basis for the formation of policy or legislative proposal. I just think that such a tool could help better articulate the voice of the people, and provide a very dynamic and public outlet for assembly, and even protest.
Anyways, I think stuff like this could be a very powerful feature, for the people (if implemented properly, which is an ambiguous statement, I suppose). Simply put, crowd-sourcing could allow 'We the People' to have a visible input, in government. It just seems, to me, crowd-sourcing where government is concerned, would be safest, as a gauge of opinion--not a trigger towards action.
L'enfer est plein de bonnes volontes et desirs (hell is full of good wishes and desires)
He has not acquired a fortune; the fortune has acquired him. -- Bion