I am one of the developers of MIDI Guitar, a software solution for turning your guitar into a MIDI guitar. We are currently in beta and are looking for feedback from users to help us shape the product.
You can download the beta from our website: MIDI Guitar for Windows and Mac
MIDI Guitar is the world’s first software solution to transcribe guitar playing into MIDI in real-time with latency and accuracy comparable to hardware MIDI guitar solutions. It's 5 years under development and based upon new patent-pending polyphonic pitch detection and -prediction technology.
Thanks for the taking the time to read this post and we look forward to hearing your feedback.
Here are a few of our users demonstrating MIDI Guitar.
JamOrigin MIDI Guitar Demo - Chopin Fantasie Impromptu op.66 - Georgi Stanchev