Really? Another Sinatra URL Shortener in Ruby?

With my recent interest in Sinatra I decided to make some us of it and write a URL shortener service for with it. This also gave me an excuse to polish up my DataMapper skills a bit.

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Now, it’s finished! I put the app on http://github.com/ariejan/firefly. Feel free to fork!

Not sure if it works? Try this: http://aj.gs/2

Questions? Please use the comments!