Custom Website Project Similar to Twitter

I am looking to create a new link-sharing type of website. I want the idea, look and feel, and functionality of the website to be very similar to [login to view URL] with the functionality of http://www.reddit.com. What the website will be is a feed of links from the people you "follow" your friends. It combines twitter with reddit to provide you with nothing but thinks that your friends like and want to share with people. Key features: - Simple Login (username, email, password, password verification, captcha) - Have the ability to follow, and have people follow you as on twitter. - Have a feed as on twitter with everything the people you are following post. - Have the ability to reply, retweet, everything you can do on twitter. - If post links to image or video, show a thumbnail (as on www.reddit.com.) - Have customizable profile such (as on twitter). - Users may only post links with a brief description (as on reddit) Thanks and happy bidding! Please do not hesitate to ask if you have any questions!