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At what point do you put your SO reputation in your resume?
As the reputation score indicates the following:
May we include the link to our reputation to project our skills to employers? If yes, then what we can do to improve our reputation further?
Given stackoverflow's moves in promoting careers.stackoverflow.com, I would think they would in fact encourage people to make their reputation, indeed their entire user profile, public when dealing with potential employers.
Now this is a big move towards increased online identity transparency. As casperOne noted, users with 10K+ reputation can still see your deleted questions and answers. First off they're not linked to from your profile, so they'd be tough to find, and even if they were, I would hope the very fact that you've deleted those posts is taken into account when checking a user's record on stackoverflow. Also keep in mind potential employers can often find your profile on their own and poke around anyway.
In addition, this should encourage better behavior on stackoverflow because it emphasizes the fact that your stackoverflow user and its record is tied to your - pardon the acronym - 'irl' identity. You should treat it as such.
Can you? Yes, but it might require attribution as per the CC license (kind of joking, kind of serious on this).
Even though rep is probably covered on the license, I think it would be a huge waste of StackExchange's resources to find all of the places on the Internet (and off) that a user's reputation is used and then somehow get them to not use it.
That said, I wouldn't worry about including it (without attribution) in your resume.
The question you should be asking is do you want to include your rep on your resume? Is what you've contributed here on StackOverflow (or any StackExchange site for that matter) something that you believe is worth exposing to potential employers?
That's a question that only you can answer, given that you produced the content that you are referencing on your resume.
Also, be aware of the fact that 10K+ users can still see your deleted content (questions and answers), so if the person interviewing you decides that they want to dig deeper into your account, there's a possibility of them coming across something you don't want seen, even if you delete the content.
