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.
Using the menu to the left, you can find several pages on specific topics from the Greek alphabet to epigraphy and ancient manuscripts. Use the menu to the left to explore the variety.
The Center for New Testament Restoration, created by Alan Bunning, provides a fantastic collection of resources for studying the manuscripts of the Greek New Testament up to 400 CE.