HOW'S YOUR AVESTAN? On the Agade list, Jack Sasson noted the following:

At http://www.fas.harvard.edu/~iranian/ P. Oktor Skjaervo has posted introductory surveys (in PDFs) of:

Languages:
* Introduction to Young Avestan
* Introduction to Old Avestan
* Introduction to Old Persian
* Introduction to Sogdian

Religions:
* Introduction to Zoroastrianism
* Introduction to Manicheism

With this disclaimer:
"The material on this site is intended for teaching and learning. As such it is constantly corrected, updated and, hopefully, improved. It is therefore recommended that you check back regularly for updates. Obviously, it reflects the author's current opinions on many issues, but not on all. Therefore, if you want to cite anything here for the purpose of scholarly discussion, please check with the author first. Many points of interpretation and translation have been discussed in various articles, as well, for which see the Bibliography http://www.fas.harvard.edu/~iranian/POS_CV_Biblio.pdf."

Professor Skjaervø, by the way, is translating the Manichaean Iranian fragments of the Book of Giants for the More Old Testament Pseudepigrapha Project.