HN: I'll run a marathon to build whatever you decide on tweet.in

You could build a twitter search app, which searches and returns real time news. It should be capable of categorizing tweets about an event as headline(MJ's dead), more info at(latimes.com), comments.<p>In short it should search twitter for real news and display it in a traditional blog style. Perhaps, it could even display excerpts from the info source site. The comments display should be real time so that you can in effect discuss the news with totally random people without having to follow them or anything.<p>A killer feature would be an up/down voting system, so that any noise in the news items gets immediately voted out. Btw killer domain name. Perhaps use "What's tweetin now?" as a tag line.<p>EDIT: Why it would be valuable: Ask Jeff Goldblum :P ( <a href="http://technologizer.com/2009/06/25/twitter-the-fastest-way-to-get-informed-or-misinformed/" rel="nofollow">http://technologizer.com/2009/06/25/twitter-the-fastest-way-...</a> )<p>EDIT2: You could also add a user rating system like the one at stackoverflow, in order to get the bots out and give more weightage to more popular users.

Does Wolfram|Alpha have an API? if so, you could do a pretty cool question/answer thing.<p><pre><code> erikwiffin: @tweetin why is the sky blue? tweetin: @erikwiffin The sky's blue color is a result of the effect of Rayleigh scattering. Shorter-wavelength blue light is... http://bit.ly/3qaEo </code></pre> tweet.in could be a searchable/rankable/commentable database of all the searches that it has performed.

Some sort of user quality measurement / recommendation engine thingy.<p>There's a lot of bullshit on Twitter these days, we need tools to sift through it to find the good stuff. Not Twitter's "Suggested Users" list, which mostly contains celebrities and companies.<p>There's a lot of metrics you could use:<p>* negative points for "follow-baiting", i.e. following hundreds or thousands of random users, hoping they'll follow you back, then unfollowing the people who don't follow you.<p>* number of user's Tweets favorited (normalized by number of followers?)<p>* average follower's rating. kind of like PageRank.<p>These are just a few off the top of my head.

I heard a rumor that people use twitter like a search engine -- ask a question, get answers.<p>Make a bot that records such questions, and their answers, and then make a search engine over the records.<p>Expert Mode: discern between questions like Am I fat?? vs. What is a cheap but nice hotel in LA? -- although it maybe funny not to.<p>Is there some kind of tweet stream you can process for this?? It seems like it would hammer the twitter infrastructure so it may not be coool.

I think the ".in" is perfect for some location specific service. You could build urls like tweet.in/London etc. There are already some services that show you twitter-users in some specific city or area, the problem is that these people do not always tweet about their city, so it's almost useless.<p>I once thought of a service that lets you add a location to a tweet and a short url. That service would create a map with all your tweets composed in that way.

"Tweeting, inverted".<p>From my knowledge of twitter (have NEVER used it), it allows one person or entity to publish messages for everyone to see.<p>What if several people want to publish messages TO someone or some entity (like a company), and want them to be seen publicly? You create a channel for that entity on tweet.in and tweet your message into the channel. Others will be free to join in. It'll be like one of those public boards where you can leave messages on particular topics.<p>So, for example, you'll have messages for the Iranian leaders, condolence messages for MJ, product feedback on Vista, etc.

You could build an app that doesn't have anything to do with tweeting. But that may be too hard to come up with.

You might also run into copyright/trademark issues with that domain-name. see: <a href="http://www.techcrunch.com/2009/07/01/twitter-grows-uncomfortable-with-the-use-of-the-word-tweet-in-applications/" rel="nofollow">http://www.techcrunch.com/2009/07/01/twitter-grows-uncomfort...</a>

tweet.in definetely sounds like you should be focusing on the publishing of tweets than the consuming.<p>one thing I have thought about doing with twitter is "lifestreaming" but properly, I want to mention gigs I have gone to, films I have watched, books I have read, bands i like. I may rate them, write a short review. but I would like to be able to go back over and see my history without silly searches