Groupon Clone with CodeIgniter

[eluser]alexaaaaaaaaaa[/eluser]
Hi, this thread it'll be dedicated to my new project.
My project is to start creating a groupon clone 100% with codeigniter.
So most of the posts will be dedicated to the script.
Plugins, library helpers whatever will be posted here.

I'll ask nice admins of this forum not to flag this as spam.

If you want features this is what i was thinking for the first time
Features
deal info, max/min boughts, max orders per deal, boughts so the deal goes on, price discount
Payments: credit card, paypal, authorize.net site credits ssl encryption.
Share: twitter facebook whatever social plugin, referral sistem comments, discuss deal
Google map, facebook login, hmm buy coupon for a friend
Auto send newsletters to users
Export users/coupons
Analytics Google deals seales users etc.
And now wish me good luck.
Also i'm waiting for feedback from you guys about features requests and comments.
Please feel free to contribute.
Regards,
Alex