Many crazy quilters have discovered Needlepunch which is also known as Bunka embroidery. This Overview from Dancing Needles gives you an idea of what the technique is like. Needle punch is a traditional Russian technique, which uses a particular type of needle. The needle is a continuous feed system which feeds embroidery thread as you work to create a textured looped surface. Effectively you draw with thread using a particular form of needle. This site has illustrations on how to thread the needle as well as instructions on how to do it.
So, What is Bunka? is an illustrated article which explains what this form of embroidery is. Basic Instructions and useful tips on how you work this form of embroidery are also found on the same site as both articles are provided by Klema Bunka Punch Embroidery
Dancing Needles also provide this free pattern for a butterfly which could be embroidered in a regular manner or worked using either punch needle.