I don't know if this was already a topic on binrev. If it was, I'm sorry, that I make a new one. I found an interesting page on instructables.com about an Arduino based Blue Box. I found it quit interesting and cool and decided to build one. It works and was something new. The Box has alot of tone series and features. I just wanted to give a hint for a future project and can say, that it was fun to build one. I put on the link, so you can watch and decide.
Hope this will makes fun and I wish you happy building and testing.