I've decided to learn Koine as my project for this year, and I was delighted to find Mounce's Greek For The Rest of Us and Basics of Biblical Greek (workbook), along with Davis' Beginner's Grammar of the Greek New Testament in my mailbox courtesy of Amazon yesterday. Watch out, world! Soon I shall be moving from being completely ignorant to completely wrong!
For those interested in some self-study, Peter Kirby is leading a study group entitled Greek Study with Mounce over at Ebla Forums aimed at tyros like your trusty writer. The hardworking Kirby, whom I have on good authority is actually a set of triplets, is well known for his many websites, including the wonderful Early Christian Writings.