Yes, such thing does exist https://microbits.com - you can test it out trough the demo news paper ceptacle.com/post and ask me questions if you find some issues.

I created microbits.com last year, and have had some issues in finding a) the right exchange rate policy and b) a reasonable way to inject bitcoins into the system - I have a credit card setup running, but credit card -> bitcoins are a bit of a challenge.

Any particular project you have in mind for your request ?

Sincerely,

Michael