This afternoon USA Network announced two new episodes they have added to season eight - earlier this year five more scripts were ordered. The network chose one of the episodes from the five new scripts, but the second episode is up to loyal fans to decide via voting.
See story here: http://www.deadline.com/2013/06/psych-gets-order-for-two-more-episodes-one-to-be-determined-by-fans/
See TV.com's post here: http://www.tv.com/news/news-briefs-a-whole-bunch-of-people-watched-under-the-dome-137220351851/
And cast your vote here: http://www.usanetwork.com/content/psych-episode-vote