[Developer Contest] Tell us your Idea & Win!

I am interested

It could be an plugin for web browsers, or a website (account), or a very popular button on every website (like G+ or Facebook Like)... My idea is to have a service / product / web place and with it to be able to follow (only) the information I am interested in. If I see a product and I wish to buy it, or to follow it - I will click on ,,I am interested button" and if there will be later a special offer I will know. But it will be not only for products. If I see an event in which I am interested I will follow it too. So, with a single system / service I will be able to know all about I am interested. (News, products, books etc.) This idea could be extended to f a c e book application like ,,See what I am interested in. Maybe you want, too... Or maybe you will buy for me what I wish. :)" I know there is websites like ,,m y w i s h l i s t", but this idea is more... Something like RSSReader + WishLIST + FollowTwitter + Chat + Newsletter + Agenda... ALL in one: ,,Trust me. I will not forget."