The OpenText.org project is a web-based initiative to provide annotated Greek texts and tools for their analysis. The project aims both to serve, and to collaborate with, the scholarly community. Texts are annotated with various levels of linguistic information, such as text-critical, grammatical, semantic and discourse features. Beginning with the New Testament, the project aims to construct a representative corpus of Hellenistic Greek to facilitate linguistic and literary research of these important documents. These annotated texts will be made freely available to the scholarly community on the understanding that they will in return contribute any additions or alterations made to them. Further, it is anticipated that scholars will be involved in the text annotation process and in the use and development of analytical tools.
There's not much more there: the project still seems to be in its infancy. But if you're interested in getting involved, I'm sure they would be happy to hear from you. I heard about it some time ago from Professor Stanley Porter at McMaster Divinity College, who is one of the organizers.
As you may have guessed, I'm writing a chapter section today on computer resources for analyzing Hellenistic Greek texts.