Well...
So I used an opener on a girl last night (HB10)
I sent her a message:
Subject: Its you ...
"Youre that crazy girl I met at the club last night right? How you doing crazy girl?!"

HB10:
Hmm no, its not me ...

Me: I know, it was a joke slowpoke...
Or maybe you have a twin girl ...?
Anyways, whats your name?

HB10: Hmm no you have bad memory ... hehe ..
I'm ___

Me:
Wait before we get to know each other I need to ask you two questions:
1) Can you cook?
2) are you rich?

HB10:
Well, I can cook
And I'm rich (body rich) (this was said in spanish so its a different translation... the point is she was telling me she is hot) SO at this point I think .. ok, so this is a self aware girl I should really neg her ...

Me: ___ We've just met and you're already lying to me? ..
Not a way to start a relationship ..

She then asked me for my MSN, I gave it to her, and chatting on MSN ...
I was supposedly negging her.. at one point she said something like "You're so mean, I was starting to love you" ...
And I said "Hey slow down, we're going too fast" ...

So.. I cut off the chat, I had to go.
So how do I really playfully neg online??
I was thinking of asking her, the superpower line:

"Whats your number one superpower?
YOu get points for being creative... don't think it too hard " ....

Well... I just need some pointers here, basically on bringing her down of her pedestal...
How would I also neg her on the pictures? Every guy is telling her "oh you look so good" and stuff like that ...

Thanks for the help!

I think you've handled the pedestal problem. It's usually a problem with the frame, and talking to her like she's not human. You've resolved this. What you want to do now is get to a point of comfort with her at which you CAN compliment her honestly, and on things not every other AFC does. If you know she get compliments for something, don't go there, unless she goes there. Share stories (DHV), shoot the shit, be hard to get a hold of (DHV), keep the conversations short (unless she keeps talking), don't be needy. Be different, be playful, be sexworthy.
Once you have enough comfort and rapport go for the number and work on the meetup.

On the pictures, I wouldn't bother. If I were though, I'd pic one that has no comments, or very little, and say something like "you remind me of my weird ex" (credit to another thread on this forum), modify appropriately if you think the neg is too strong.