of post is reference to Sourceforge.

Anyhoo, Myst Online has turned into an open source project. Which means pretty good things, if you ask me.

A. Free Myst Online, a GIANT improvement over pay-to-play.

B.  Open source, which means lots of user created stuff/code improvements.

C. Moar Myst.

D. ???

E. Profit!

Source: Myst Online to be turned into open source project – Big Download Blog.