Tolero was kind enough to give me some information on the update that is scheduled to come to Risia next week. The update will not be a feature-complete version of Mod 8. Instead it will include the New Player Experience and the Hireling mechanics. This was done so that it could be released sooner so that those more risky mechanics could be tested by a larger population, as well as to make sure that the players didn't get side-tracked by the new high-level content. Like previous updates, the high-level content is planned to be made available on Risia closer to the release of Mod 8 for it's own wide-audiance testing.
She also said that Mod 8 is still on track, and barring any unexpected issues creeping up on Risia, is scheduled to be released in mid October.
I'm following up on some other questions and will be posting them to DDO Reports when I find more information.