Greek Bible Study - Extremely valuable site that includes the Greek text of the New Testament, with translations, grammatical forms, opportunity to store notes online, and links to audio recordings of the texts. It also provides lessons on NT Greek grammar and numerous other resources that support the Greek learner.
Perseus Collection New Testament - The Perseus Digital Collection contains the original texts and English translations of classical Greek and Latin literature, but also of the Greek and Latin New Testament. Clicking on any word in these texts will pull up an analysis of that word, a translation, and links to the full and abridged versions of the most authoritative dictionary of ancient Greek (Liddell-Scott-Jones). The main problem of the site is that it generally provides classical meanings for the words, which sometimes differ from their New Testament meanings. Otherwise it's a wonderful resource.
Greek and Latin texts - with grammatical and lexical aids. Scroll down to the New Testament books (Westcott & Hort NT version - differs from text normally used today).
Audio Recordings of the Gospel of John The speaker reads the entire Greek New Testament, using a pronunciation very close to the one we are using in class.