Since Netscape 1 and probably before that you’ve been able to get the source of a page from the View menu. This has been true in IE for its many versions as well. For whatever reason, in the latest nightly (I expect it will be the 0.3 release) the Phoenix developers moved it to the Tools menu. In the same version, they moved Preferences from the Edit menu to the Tools menu, which is an obvious imitation of IE’s placement of Internet Options. It’s odd that they ignore user expectations for one item and pay attention to it for the other.
They also brought back the Go menu.