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It's a neat tool, but I don't know how often I'd use it. Pre-loading the info is neat for twitter, but the additional second or two it takes to copy/paste the info into your app seems like it'd be longer than just waiting for all the pages to load. Middle-clicking and background opening them in new-tabs is easy enough for me.
There's an API to make the twitter link fetching possible. Was curious how people might use it, think there are lots of posibilities. API is very very simple, just 1 RESTful controller. Hope there will be someone who can come up with a cool application that makes use of it. http://prldr.com/pages/api.html
Your app reminds me of http://www.flipboard.com/ It's a very cool idea to be sure. I wish there were Flipboard for the rest of us. Maybe that could be an interesting alley to explore.
For inspiration, http://www.jinni.com/ has nice picture sorting.