If you would like to join the discussion about the application of Linguistics to the study of Hellenisitc Greek or just listen in, visit the Greek Language and Linguistics Blog.
You can learn Hellenistic Greek here at Greek-Language.com. Click on the image above to get started today.
You will find many pages on specific topics here from the Greek alphabet to epigraphy and ancient manuscripts. Use the menu to the left to explore the variety.
Alan Bunning has provided a gold mine of resources for studying the manuscripts of the Greek New Testament. You can view all of the manuscripts up to 400 CE.