Seumas Macdonald has posted a great discussion of a problem facing many who are using communicative methods to teach Ancient Greek in institutions that require students to know the traditional metalanguage for talking about Greek rather than simply speaking Greek. I highly recommend it.
Today I borrowed a copy of Πόλις, Speaking Ancient Greek as a Living Language from a friend. Obviously I haven’t completed reading it yet, but I’ve read enough to know that I can recommend it. The forward alone is worth the price of the book. It gives the best argument I have seen in print for beginning your study of Ancient Greek with the koine dialect. It also gives a very well written explanation for why learning koine Greek as a spoken language is the correct path to learning to read texts written in that language.
If you are interested in learning Biblical Greek, and you want to know how it sounded at the time of Jesus, you will probably enjoy these materials tremendously. Using drawings and audio, Buth employs a method commonly found in books on modern languages. It’s a great way to internalize the language!
Take a look at the following nine minute video by James Tauber to see a very innovative use of currently developing technology to support acquiring New Testament Greek. He posted this video to Youtube about two years ago. I hope significant progress has been made on the project since then.